'Doubt' in the Bible

And he said to them, Without doubt you will say to me, Let the medical man make himself well: the things which to our knowledge were done at Capernaum, do them here in your country.

Now Herod the king had news of all these things: and he was in doubt, because it was said by some people that John had come back from the dead;

And there will be signs in the sun and moon and stars; and on the earth, fear among the nations and doubt because of the loud noise of the sea and the waves;

And when the captain saw what was done, he gave praise to God, saying, Without doubt this was an upright man.

And while they were in doubt about it, they saw two men in shining clothing by them:

And he said to them, Why are you troubled, and why are your hearts full of doubt?

And because, for joy and wonder, they were still in doubt, he said to them, Have you any food here?