The Case for the Preservation of the Saints- Part Two: The Teachings of Christ
No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day. It is written in the prophets, `AND THEY SHALL ALL BE TAUGHT OF GOD.' Everyone who has heard and learned from the Father, comes to Me. Not that anyone has seen the Father, except the One who is from God; He has seen the Father. Truly, truly, I say to you, he who believes has eternal life. (John 6:44-47 NASB)
In this passage, the Lord Jesus gives two doctrines that directly support the idea that a person who is “saved” cannot be “unsaved:”
1. Jesus teaches that He will raise up (resurrect) all who come to faith in Him. "No one can come to Me unless the Father who sent Me draws him; and I will raise him up on the last day." As He teaches elsewhere:
I am the resurrection and the life. He who believes in Me, though he may die, he shall live. (John 11:25b NKJV)
Jesus said, “I will raise him up on the last day” and “he shall live.” The certain connection of a person’s coming to faith to their eventual resurrection- based upon the drawing of the Father- ensures that a person who comes to true faith in Christ will never lose their salvation.
2. Jesus teaches that those who believe are given eternal life at the time of their belief. "Truly, truly, I say to you, he who believes has eternal life." As He teaches elsewhere:
For God so loved the world that He gave His only begotten Son that whosoever believeth in Him shall not perish, but have everlasting life. (John 3:16 KJV)
That the life we possess when we come to Jesus in faith is everlasting- or eternal- should indicate to us that we cannot lose it. If we could lose eternal life, then it would not really be eternal.