'Believe' in the Bible

And those by the way side are they that have heard; then cometh the devil, and taketh away the word from their heart, that they may not believe and be saved.

And those on the rock are they who, when they have heard, receive the word with joy; and these have no root, who for a while believe, and in time of temptation fall away.

But Jesus hearing it, answered him, Fear not: only believe, and she shall be made whole.

And they reasoned with themselves, saying, If we shall say, From heaven; he will say, Why did ye not believe him?

If thou art the Christ, tell us. But he said unto them, If I tell you, ye will not believe:

And he said unto them, O foolish men, and slow of heart to believe in all that the prophets have spoken!