But Jesus also said these
John 3
10 "You are Israel's teacher," said Jesus, "and do you not understand these things? 11 Very truly I tell you, we speak of what we know, and we testify to what we have seen, but still you people do not accept our testimony. 12 I have spoken to you of earthly things and you do not believe; how then will you believe if I speak of heavenly things? 13 No one has ever gone into heaven except the one who came from heaven—the Son of Man.[e] 14 Just as Moses lifted up the snake in the wilderness, so the Son of Man must be lifted up,[f] 15 that everyone who believes may have eternal life in him."[g]
16 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. 17 For God did not send his Son into the world to condemn the world, but to save the world through him. 18 Whoever believes in him is not condemned, but whoever does not believe stands condemned already because they have not believed in the name of God's one and only Son. 19 This is the verdict: Light has come into the world, but people loved darkness instead of light because their deeds were evil. 20 Everyone who does evil hates the light, and will not come into the light for fear that their deeds will be exposed. 21 But whoever lives by the truth comes into the light, so that it may be seen plainly that what they have done has been done in the sight of God.
John 3
For the one whom God has sent speaks the words of God, for God gives the Spirit without limit. 35 The Father loves the Son and has placed everything in his hands. 36 Whoever believes in the Son has eternal life, but whoever rejects the Son will not see life, for God's wrath remains on them.
John 5
24 "Very truly I tell you, whoever hears my word and believes him who sent me has eternal life and will not be judged but has crossed over from death to life. 25 Very truly I tell you, a time is coming and has now come when the dead will hear the voice of the Son of God and those who hear will live.
John 6
28 Then they asked him, "What must we do to do the works God requires?"
29 Jesus answered, "The work of God is this: to believe in the one he has sent."
39 And this is the will of him who sent me, that I shall lose none of all those he has given me, but raise them up at the last day. 40 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 11
25 Jesus said to her, "I am the resurrection and the life. The one who believes in me will live, even though they die; 26 and whoever lives by believing in me will never die. Do you believe this?"
John 12
35 Then Jesus told them, "You are going to have the light just a little while longer. Walk while you have the light, before darkness overtakes you. Whoever walks in the dark does not know where they are going. 36 Believe in the light while you have the light, so that you may become children of light." When he had finished speaking, Jesus left and hid himself from them
John 8
12 When Jesus spoke again to the people, he said, "I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life."
John 12
4 Then Jesus cried out, "Whoever believes in me does not believe in me only, but in the one who sent me. 45 The one who looks at me is seeing the one who sent me. 46 I have come into the world as a light, so that no one who believes in me should stay in darkness.
Jesus says to believe in Him also.