4 Bible Verses about Incredulity

But Thomas one of the twelve, called Didymus, was not with them when Jesus came.

Behold, I will put a fleece of wool in the threshing place. And if the dew be on the fleece only, and dry upon all the earth beside: then I shall be sure that thou wilt save Israel by my hand as thou saidest." And it came to pass. And he rose up early on the morrow, and he thrust the fleece together and wrung the dew thereout and filled a bowl of water. And Gideon said unto God, "Be not angry with me, that I speak once more; let me prove only once again with the fleece. Let it be dry only upon the fleece, and dew upon all the ground about."read more.
And God did so that same night: so that it was dry upon the fleece only, and on all the ground about, dew.

Then brought they to the Pharisees, him that a little before was blind. For it was the Sabbath day when Jesus made the clay, and opened his eyes. Then again the Pharisees also asked him how he had received his sight. He said unto them, "He put clay upon mine eyes; And I washed, and do see."read more.
Then said some of the Pharisees, "This man is not of God, because he keepeth not the Sabbath day." Others said, "How can a man that is a sinner do such miracles?" And there was strife among them. Then spake they unto the blind again, "What sayest thou of him, because he hath opened thine eyes?" And he said, "He is a prophet." But the Jews did not believe of the fellow, how that he was blind, and received his sight: until they had called the father and mother of him that had received his sight. And they asked them saying, "Is this your son, whom ye say was born blind? How doth he now see then?" His father and mother answered them and said, "We know well that this is our son, and that he was born blind. But by what means he now seeth, that can we not tell: or who hath opened his eyes, can we not tell. He is old enough, ask him, let him answer for himself, of things that pertain to himself." Such words spake his father, and mother, because they feared the Jews: for the Jews had conspired already that if any man did confess that he was Christ, he should be excommunicated out of the Synagogue. Therefore said his father and mother, "He is old enough, ask him." Then again called they the man that was blind, and said unto him, "Give God the praise; we know that this man is a sinner." He answered and said, "Whether he be a sinner or no, I cannot tell. One thing I am sure of: that I was blind, and now I see." Then said they to him again, "What did he to thee? How opened he thine eyes?" He answered them, "I told you right now! A And ye did not hear. Wherefore would ye hear it again? Will ye also be his disciples?" Then rated they him, and said, "Thou art his disciple. We be Moses' disciples. We are sure that God spake with Moses. This fellow we know not from whence he is." The man answered, and said unto them, "This is a marvelous thing that ye know not whence he is, seeing he opened mine eyes. For we be sure that God heareth not sinners: But if any man be a worshipper of God, and do what his will is, him heareth he. Since the world began was it not heard that any man opened the eyes of one that was born blind. If this man were not of God, he could have done nothing." They answered, and said unto him, "Thou art altogether born in sin: and dost thou teach us?" And they cast him out. Jesus heard that they had excommunicated him: and as soon as he had found him he said unto him, "Dost thou believe on the son of God?" He answered, and said, "And who is it, Lord, that I might believe on him?" And Jesus said unto him, "Thou hast seen him, and he it is that talketh with thee." And he said, "Lord, I believe," and worshipped him. Jesus said, "I am come unto judgment, into this world: that they which see not, might see, and they which see might be made blind." And some of the Pharisees which were with him, heard these words and said unto him, "Are we then blind?" Jesus said unto them, "If ye were blind, ye should have no sin: but now ye say, 'We see.' Therefore your sin remaineth."

But we will hear of thee what thou thinkest. For we have heard of this sect, that everywhere it is spoken against." And when they had appointed him a day, there came many unto him into his lodging: to whom he expounded and testified the kingdom of God; and preached unto them of Jesus: both out of the law of Moses, and also out of the prophets, even from morning to night. And some believed the things which were spoken, and some believed not.read more.
When they agreed not among themselves, they departed, after that Paul had spoken one word, "Well spake the holy ghost by Isaiah the prophet unto our fathers, saying, 'Go unto this people and say: with your ears shall ye hear, and shall not understand: and with your eyes shall ye see and shall not perceive. For the heart of this people is waxed gross, and their ears were thick of hearing, and their eyes have they closed, lest they should see with their eyes, and hear with their ears, and understand with their hearts, and should be converted, and I should heal them.' Be it known therefore unto you, that this salvation of God is sent to the gentiles, and they shall hear it." And when he had said that, the Jews departed from him, and had great disputations among themselves.