I have spoken to you of earthly things and you do not believe. How then will you believe if I speak of heavenly things? No one has ever gone into heaven except the one who came from heaven, the Son of Man. Just as Moses lifted up the snake in the desert, so the Son of Man must be lifted up, that everyone who believes in him may have eternal life. John 3:12-15
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. God did not send his Son into the world to condemn the world, but to save the world through him. Whoever believes in him is not condemned, but whoever does not believe stands condemned already because he has not believed in the name of God's one and only Son. John 3:16-18
Everyone who drinks this water will be thirsty again, but whoever drinks the water I give him will never thirst. Indeed, the water I give will become in him a spring of water welling up to eternal life. John 4:13-14
You diligently study the Scriptures because you think that by them you possess eternal life. These are the Scriptures that testify about me, yet you refuse to come to me to have life. John 5:39-40
Do not work for food that spoils but for food that endures to eternal life which the Son of Man will give you. On him, God the Father has placed his seal of approval. John 6:27
I tell you the truth, it is not Moses who has given you the bread from heaven, but it is my Father who gives you the true bread from heaven. For the bread of God is he who comes down from heaven and gives life to the world. John 6:32-33
I am the bread of life. He who comes to me will never go hungry and he who believes in me will never be thirsty. John 6:35
I have come down from heaven not to do my will but to do the will of him who sent me. And this is the will of him who sent me, that I shall lose none of all that he has given me but raise them up at the last day. For my Father's will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise them up at the last day. John 6:38-40