'Know' in the Bible

For I want you to know, believers, that the gospel which was preached by me is not man’s gospel [it is not a human invention, patterned after any human concept].

yet we know that a man is not justified [and placed in right standing with God] by works of the Law, but [only] through faith in [God’s beloved Son,] Christ Jesus. And even we [as Jews] have believed in Christ Jesus, so that we may be justified by faith in Christ and not by works of the Law. By observing the Law no one will ever be justified [declared free of the guilt of sin and its penalty].

So understand that it is the people who live by faith [with confidence in the power and goodness of God] who are [the true] sons of Abraham.

But at that time, when you did not know [the true] God and were unacquainted with Him, you [Gentiles] were slaves to those [pagan] things which by [their very] nature were not and could not be gods at all.

Now, however, since you have come to know [the true] God [through personal experience], or rather to be known by God, how is it that you are turning back again to the weak and worthless elemental principles [of religions and philosophies], to which you want to be enslaved all over again?

On the contrary, you know that it was because of a physical illness that I [remained and] preached the gospel to you the first time;