'Keep' in the Bible

Having then such a hope, we keep nothing back,

Do not keep company with those who have not faith: for what is there in common between righteousness and evil, or between light and dark?

Give attention to the things which are before you. If any man seems to himself to be Christ's, let him keep in mind that we are as much Christ's as he is.

Let those who say this keep in mind that, what we are in word by letters when we are away, so will we be in act when we are present.