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 floor; and if the dew be on the fleece only, and it be dry upon all the earth beside, then shall I know that thou wilt save Israel by mine hand, as thou hast said. And it was so: for he rose up early on the morrow, and thrust the fleece together, and wringed the dew out of the fleece, a bowl full of water. And Gideon said unto God, Let not thine anger be hot against me, and I will speak but this once: let me prove, I pray thee, but this once with the fleece; let it now be dry only upon the fleece, and upon all the ground let there be dew.read more.
And God did so that night: for it was dry upon the fleece only, and there was dew on all the ground.

They brought to the Pharisees him that aforetime was blind. And 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.
Therefore 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 a division among them. They say unto the blind man again, What sayest thou of him, that he hath opened thine eyes? He said, He is a prophet. But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight. And they asked them, saying, Is this your son, who ye say was born blind? how then doth he now see? His parents answered them and said, We know that this is our son, and that he was born blind: But by what means he now seeth, we know not; or who hath opened his eyes, we know not: he is of age; ask him: he shall speak for himself. These words spake his parents, because they feared the Jews: for the Jews had agreed already, that if any man did confess that he was Christ, he should be put out of the synagogue. Therefore said his parents, He is of age; 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 know not: one thing I know, that, whereas I was blind, now I see. Then said they to him again, What did he to thee? how opened he thine eyes? He answered them, I have told you already, and ye did not hear: wherefore would ye hear it again? will ye also be his disciples? Then they reviled him, and said, Thou art his disciple; but we are Moses' disciples. We know that God spake unto Moses: as for this fellow, we know not from whence he is. The man answered and said unto them, Why herein is a marvellous thing, that ye know not from whence he is, and yet he hath opened mine eyes. Now we know that God heareth not sinners: but if any man be a worshipper of God, and doeth his will, him he heareth. 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 do nothing. They answered and said unto him, Thou wast altogether born in sins, and dost thou teach us? And they cast him out. Jesus heard that they had cast him out; and when he had found him, he said unto him, Dost thou believe on the Son of God? He answered and said, Who is he, Lord, that I might believe on him? And Jesus said unto him, Thou hast both seen him, and it is he that talketh with thee. And he said, Lord, I believe. And he worshipped him. And Jesus said, For judgment I am come into this world, that they which see not might see; and that 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 blind also? 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 desire to hear of thee what thou thinkest: for as concerning this sect, we know that every where it is spoken against. And when they had appointed him a day, there came many to him into his lodging; to whom he expounded and testified the kingdom of God, persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening. And some believed the things which were spoken, and some believed not.read more.
And when they agreed not among themselves, they departed, after that Paul had spoken one word, Well spake the Holy Ghost by Esaias the prophet unto our fathers, Saying, Go unto this people, and say, Hearing ye shall hear, and shall not understand; and seeing ye shall see, and not perceive: For the heart of this people is waxed gross, and their ears are dull of hearing, and their eyes have they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and should be converted, and I should heal them. Be it known therefore unto you, that the salvation of God is sent unto the Gentiles, and that they will hear it. And when he had said these words, the Jews departed, and had great reasoning among themselves.