John 3:14-18 14And as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up, 15that whoever believes in him may have eternal life.
16"For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. 17For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him. 18 Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God.
John 6:28-29 28Then they said to him, "What must we do, to be doing the works of God?" 29Jesus answered them, "This is the work of God, that you believe in him whom he has sent."
Luke 18:9-14 9He also told this parable to some who trusted in themselves that they were righteous, and treated others with contempt: 10"Two men went up into the temple to pray, one a Pharisee and the other a tax collector. 11The Pharisee, standing by himself, prayed thus: 'God, I thank you that I am not like other men, extortioners, unjust, adulterers, or even like this tax collector. 12 I fast twice a week; I give tithes of all that I get.'
13But the tax collector, standing far off, would not even lift up his eyes to heaven, but beat his breast, saying, 'God, be merciful to me, a sinner!' 14I tell you, this man went down to his house justified, rather than the other. For everyone who exalts himself will be humbled, but the one who humbles himself will be exalted."
When Jesus says it I believe it.