Jesus healed a blind man because of his faith.

Luke 18:

35 As Jesus approached Jericho, a blind beggar was sitting beside the road. 36 When he heard the noise of a crowd going past, he asked what was happening. 37 They told him that Jesus the Nazarene was going by. 38 So he began shouting, “Jesus, Son of David, have mercy on me!”

39 “Be quiet!” the people in front yelled at him.

But he only shouted louder, “Son of David, have mercy on me!”

40 When Jesus heard him, he stopped and ordered that the man be brought to him. As the man came near, Jesus asked him, 41 “What do you want me to do for you?”

“Lord,” he said, “I want to see!”

42 And Jesus said, “All right, receive your sight! Your faith has healed you.” 43 Instantly the man could see, and he followed Jesus, praising God. And all who saw it praised God, too.