Yet to all who received him, to those who believed in his name, he gave the right to become children of God-- children born not of natural descent, nor of human decision or a husband's will, but born of God. The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the One and Only,  who came from the Father, full of grace and truth. (John 1:12-14)

Satan was a created angel -- not a son of God:

"How you have fallen from heaven, O morning star, son of the dawn! You have been cast down to the earth, you who once laid low the nations! You said in your heart, "I will ascend to heaven; I will raise my throne above the stars of God; I will sit enthroned on the mount of assembly, on the utmost heights of the sacred mountain. I will ascend above the tops of the clouds; I will make myself like the Most High." But you are brought down to the grave, to the depths of the pit." (Isaiah 14:12-15)

Jesus created all things, and in Him the fullness of God dwells!:

"He is the image of the invisible God, the firstborn over all creation. For by him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things were created by him and for him. He is before all things, and in him all things hold together. And he is the head of the body, the church; he is the beginning and the firstborn from among the dead, so that in everything he might have the supremacy. For God was pleased to have all his fullness dwell in him, and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross." (Colossians 1:15-20)
"Your attitude should be the same as that of Christ Jesus: Who, being in very nature  God, did not consider equality with God something to be grasped, but made himself nothing, taking the very nature  of a servant, being made in human likeness. And being found in appearance as a man, he humbled himself and became obedient to death-- even death on a cross! Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father. (Philippians 2:5-11)
'In the past God spoke to our forefathers through the prophets at many times and in various ways, but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom he made the universe. The Son is the radiance of God's glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven. So he became as much superior to the angels as the name he has inherited is superior to theirs. For to which of the angels did God ever say, "You are my Son; today I have become your Father " ? Or again, "I will be his Father, and he will be my Son" ? And again, when God brings his firstborn into the world, he says, "Let all God's angels worship him." In speaking of the angels he says, "He makes his angels winds, his servants flames of fire." But about the Son he says, "Your throne, O God, will last for ever and ever, and righteousness will be the scepter of your kingdom. You have loved righteousness and hated wickedness; therefore God, your God, has set you above your companions by anointing you with the oil of joy." He also says, "In the beginning, O Lord, you laid the foundations of the earth, and the heavens are the work of your hands. They will perish, but you remain; they will all wear out like a garment. You will roll them up like a robe; like a garment they will be changed. But you remain the same, and your years will never end." To which of the angels did God ever say, "Sit at my right hand until I make your enemies a footstool for your feet" ? (Hebrews 1:1-13)

Have you ever sinned the same sin twice?
All humans struggle with sin and temptation not even the apostle Paul was exempt "I do not understand what I do. For what I want to do I do not do, but what I hate I do." (Romans 7:15)
God promises there will be no double indemnity, that a forgiven sin can never be used against a person twice "I, even I, am he who blots out your transgressions, for my own sake, and remembers your sins no more." (Isaiah 43:25). "For I will forgive their wickedness and will remember their sins no more." (Hebrews 8:12).
In light of these passages, how could God bring back former sins when he refuses to remember them?  All the good works in the world will not cleanse a sinner of his sins. If people could purify themselves there would be no need for Jesus to pay the ultimate price for our transgressions.
"Who can say, "I have kept my heart pure; I am clean and without sin"? " (Proverbs 20:9)
"Everyone who has this hope in him purifies himself, just as he is pure. Everyone who sins breaks the law; in fact, sin is lawlessness. But you know that he appeared so that he might take away our sins. And in him is no sin. (1 John 3:3-5)
"If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness." (1John 1:9)
"For all have sinned and fall short of the glory of God," (Romans 3:23)

If the god of Mormonism expects people to never even have a sinful thought, who could make it?

Are you keeping the whole law?
"They tie up heavy loads and put them on men's shoulders, but they themselves are not willing to lift a finger to move them." (Matthew 23:4). Jesus accuses the Pharisees of laying burdens upon the shoulders of people which could not bear them. Mormonism is very similiar.
Does the Mormon that uses Matthew 5:48 (Be perfect, therefore, as your heavenly Father is perfect") really feel he/she has reached perfection?
"Christ redeemed us from the curse of the law by becoming a curse for us, for it is written: "Cursed is everyone who is hung on a tree."" (Galatians 3:13)
"..know that a man is not justified by observing the law, but by faith in Jesus Christ. So we, too, have put our faith in Christ Jesus that we may be justified by faith in Christ and not by observing the law, because by observing the law no one will be justified."(Galatians 2:16)
'What shall we say, then? Is the law sin? Certainly not! Indeed I would not have known what sin was except through the law. For I would not have known what coveting really was if the law had not said, "Do not covet."" (Romans 7:7)
"For just as through the disobedience of the one man the many were made sinners, so also through the obedience of the one man the many will be made righteous." (Romans 5:19)
"..because by one sacrifice he has made perfect forever those who are being made holy." Hebrews 10:14)

No matter how many good works we think we might have done, there is always a little more that we did not accomplish. Try as they may a Mormon will never be able to satisfy the requirements of God.

The color of a person's skin has no merit with God:

"For God does not show favoritism." (Romans 2:11)
"Therefore, just as sin entered the world through one man, and death through sin, and in this way death came to all men, because all sinned--" (Romans 5:12)
"For you did not receive a spirit that makes you a slave again to fear, but you received the Spirit of sonship.  And by him we cry, "Abba,  Father." The Spirit himself testifies with our spirit that we are God's children." (Romans 8:15-16)
"If you really keep the royal law found in Scripture, "Love your neighbor as yourself,"  you are doing right. But if you show favoritism, you sin and are convicted by the law as lawbreakers." (James 2:8-9) 
That includes all of us -- black, white, red, or yellow, king or slave. All of us are made in God's image.

The Bible is God's Word; and the Word of God will stand forever:

"The grass withers and the flowers fall, but the word of our God stands forever" (Isaiah 40:8)
"..but the word of the Lord stands forever." And this is the word that was preached to you." (1 Peter 1:25)
"All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness," (2 Timothy 3:16)
"He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction."  (2 Peter 3:16)

No prophet of God ever made a statement like Joseph Smith's. King Nebuchadnezzar had a similar pride to Joseph Smith's. He was driven out by God to live with the animals.
"All this happened to King Nebuchadnezzar. Twelve months later, as the king was walking on the roof of the royal palace of Babylon, he said, "Is not this the great Babylon I have built as the royal residence, by my mighty power and for the glory of my majesty? The words were still on his lips when a voice came from heaven, "This is what is decreed for you, King Nebuchadnezzar: Your royal authority has been taken from you. You will be driven away from people and will live with the wild animals; you will eat grass like cattle. Seven times will pass by for you until you acknowledge that the Most High is sovereign over the kingdoms of men and gives them to anyone he wishes." 
Immediately what had been said about Nebuchadnezzar was fulfilled. He was driven away from people and ate grass like cattle. His body was drenched with the dew of heaven until his hair grew like the feathers of an eagle and his nails like the claws of a bird. (Daniel 4:28-33)

In these last days God speaks through His Son:

"In the past God spoke to our forefathers through the prophets at many times and in various ways, but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom he made the universe. (Hebrews 1:1-2)

The authority claimed by the Mormon Church is through an "Aaronic Piesthood," which cannot be valid since Jesus abolished it when He took its place, and a "Melchizedek Priesthood," which never existed as any operative "priesthood.":

"And what we have said is even more clear if another priest like Melchizedek appears, one who has become a priest not on the basis of a regulation as to his ancestry but on the basis of the power of an indestructible life. For it is declared: "You are a priest forever, in the order of Melchizedek." The former regulation is set aside because it was weak and useless (for the law made nothing perfect), and a better hope is introduced, by which we draw near to God. " (Hebrews 7:15-19)

"But the ministry Jesus has received is as superior to theirs as the covenant of which he is mediator is superior to the old one, and it is founded on better promises. For if there had been nothing wrong with that first covenant, no place would have been sought for another. But God found fault with the people and said : "The time is coming, declares the Lord, when I will make a new covenant with the house of Israel and with the house of Judah. It will not be like the covenant I made with their forefathers when I took them by the hand to lead them out of Egypt, because they did not remain faithful to my covenant, and I turned away from them,  declares the Lord. This is the covenant I will make with the house of Israel after that time, declares the Lord. I will put my laws in their minds and write them on their hearts. I will be their God, and they will be my people. No longer will a man teach his neighbor, or a man his brother, saying, `Know the Lord,' because they will all know me, from the least of them to the greatest. For I will forgive their wickedness and will remember their sins no more." By calling this covenant "new," he has made the first one obsolete; and what is obsolete and aging will soon disappear. (Hebrews 8:6-13)

Jesus is our only High Priest in the likeness of Melchizedek -- He alone holds this priesthood permanently:

"And what we have said is even more clear if another priest like Melchizedek appears, one who has become a priest not on the basis of a regulation as to his ancestry but on the basis of the power of an indestructible life. For it is declared: "You are a priest forever, in the order of Melchizedek." The former regulation is set aside because it was weak and useless (for the law made nothing perfect), and a better hope is introduced, by which we draw near to God. And it was not without an oath! Others became priests without any oath, but he became a priest with an oath when God said to him: "The Lord has sworn and will not change his mind: `You are a priest forever.'" Because of this oath, Jesus has become the guarantee of a better covenant. Now there have been many of those priests, since death prevented them from continuing in office; but because Jesus lives forever, he has a permanent priesthood. Therefore he is able to save completely those who come to God through him, because he always lives to intercede for them. Such a high priest meets our need--one who is holy, blameless, pure, set apart from sinners, exalted above the heavens. Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself. For the law appoints as high priests men who are weak; but the oath, which came after the law, appointed the Son, who has been made perfect forever. " (Hebrews 7:15-28)
"When Christ came as high priest of the good things that are already here,  he went through the greater and more perfect tabernacle that is not man-made, that is to say, not a part of this creation. He did not enter by means of the blood of goats and calves; but he entered the Most Holy Place once for all by his own blood, having obtained eternal redemption. The blood of goats and bulls and the ashes of a heifer sprinkled on those who are ceremonially unclean sanctify them so that they are outwardly clean. How much more, then, will the blood of Christ, who through the eternal Spirit offered himself unblemished to God, cleanse our consciences from acts that lead to death,  so that we may serve the living God! For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance--now that he has died as a ransom to set them free from the sins committed under the first covenant." (Hebrews 9:11-15) 

Over 500 verses deal with death, and over 300 deal with salvation. Not one verse even hints that we can be saviors of the dead. The Bible tells us "And as it is appointed unto men once to die, but after this the judgment:" (Hebrews 9:27)

The Mormon concept states: "After this comes missionary lessons, a proxy baptism, and a series of Mormon ordinances that will allow you to become gods..."

"There is a judge for the one who rejects me and does not accept my words; that very word which I spoke will condemn him at the last day." (John 12:48)

Paul referred to Christ as our judge -- not Joseph:

"In the presence of God and of Christ Jesus, who will judge the living and the dead, and in view of his appearing and his kingdom, I give you this charge:" (2 Timothy 4:1)