What the Bible says about eternal life

My sheep hear my voice, and I know them, and they follow me:

And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.

My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.

I and my Father are one. (John 10: 27-30)

And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent. (John 17: 3)

For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. (Romans 6: 23)

. . . eternal life, which God, that cannot lie, promised before the world began. (Titus 1: 2)