Jesus, the only begotten Son of God says: “Search the Scriptures; for in them ye think ye have eternal life: and they are they which testify of me. And ye will not come to me, that ye might have life” (John 5:39–40).
Being alive on this earth does not mean that we have life: this is only a lifetime.
“Set your affection on things above, not on things on the earth. For ye are dead, and your life is hid with Christ in God” (Colossians 3:2–3).
“For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God” (John 3:16-18).
Jesus also says: “Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven” (Matthew 7:21). “For many are called, but few are chosen” (Matthew 22:14).
“He that hath an ear, let him hear what the Spirit saith unto the churches; he that overcometh shall not be hurt of the second death” (Revelation 2:11).
“Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting” (Galatians 6:7–8).
“There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit” (Romans 8:1).