Jesus said to her, 'I am the resurrection and the life; he who believes in Me shall live even if he dies, And everyone who lives and believes in Me shall never die. Do you believe this? She said to Him, 'Yes, Lord; I have believed that You are the Christ, the Son of God, even He who comes into the world'.
but these have been written that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name.
1 John 5:11-13
And the witness is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life. These things I have written to you who believe in the name of the Son of God, in order that you may know that you have eternal life,