'Know' in the Bible

For I would have you know, brethren, that the gospel which was preached by me is not according to man.

However at that time, when you did not know God, you were slaves to those which by nature are no gods.

But now that you have come to know God, or rather to be known by God, how is it that you turn back again to the weak and worthless elemental things, to which you desire to be enslaved all over again?

but you know that it was because of a bodily illness that I preached the gospel to you the first time;