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 on the floor; and if the dew shall be on the fleece only, and it shall be dry upon all the earth besides, then shall I know that thou wilt save Israel by my hand, as thou hast said. And it was so: for he rose early on the morrow, and pressed the fleece, and wrung the dew out of the fleece, a bowl-full of water. And Gideon said to God, Let not thy anger be hot against me, and I will speak but this once: Let me make trial, 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 before was blind. And it was the sabbath when Jesus made the clay, and opened his eyes. Then again the Pharisees also asked him how he had received his sight. He said to them, He put clay upon my eyes, and I washed, and do see.read more.
Therefore said some of the Pharisees, This man is not from God, because he keepeth not the sabbath. Others said, How can a man that is a sinner do such miracles? And there was a division among them. They say to the blind man again, What sayest thou of him, that he hath opened thy 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 will speak for himself. These words his parents spoke, because they feared the Jews: for the Jews had agreed already, that if any man confessed that he was Christ, he should be put out of the synagogue. Therefore said his parents, He is of age; ask him. Then again they called the man that was blind, and said to him, Give God the praise: we know that this man is a sinner. He answered and said, Whether he is a sinner, I know not: one thing I know, that whereas I was blind, now I see. Then they said to him again, What did he to thee? how opened he thy eyes? He answered them, I have told you already, and ye did not hear: Why would ye hear it again? will ye also be his disciples? Then they reviled him, and said, Thou art his disciple; but we are the disciples of Moses. We know that God spoke to Moses: as for this man, we know not whence he is. The man answered and said to them, Why, herein is a marvelous thing, that ye know not from whence he is, and yet he hath opened my eyes. Now we know that God heareth not sinners: but if any man is a worshiper of God, and doeth his will, him he heareth. Since the world began hath it not been heard that any man opened the eyes of one that was born blind. If this man were not from God, he could do nothing. They answered and said to 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 to him, Dost thou believe on the Son of God? He answered and said, Who is he, Lord, that I may believe on him? And Jesus said to him, thou hast both seen him, and it is he that talketh with thee. And he said, Lord, I believe. And he worshiped him. And Jesus said, For judgment I am come into this world, that they who see not, may see; and that they who see, may be made blind. And some of the Pharisees who were with him heard these words, and said to him, Are we blind also? Jesus said to them, If ye were blind, ye would have no sin: but now ye say, We see; therefore your sin remaineth.

But we desire to hear from 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 Paul had spoken one word, Well spoke the Holy Spirit by Isaiah the prophet to our fathers, Saying, Go to 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 become 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 to you, that the salvation of God is sent to the Gentiles, and they will hear it. And when he had said these words, the Jews departed, and had great reasoning among themselves.