'Idea' in the Bible

Let no man have a false idea. If any man seems to himself to be wise among you, let him become foolish, so that he may be wise.

But some of you have been puffed up through getting the idea that I am not coming to Corinth.

For if a man sees you, who have knowledge, taking food as a guest in the house of an image, will it not give him, if he is feeble, the idea that he may take food offered to images?