'Know' in the Bible

Now we know [without any doubt] that the Law is good, if one uses it lawfully and appropriately,

who wishes all people to be saved and to come to the knowledge and recognition of the [divine] truth.

(for if a man does not know how to manage his own household, how will he take care of the church of God?).

in case I am delayed, so that you will know how people ought to conduct themselves in the household of God, which is the church of the living God, the pillar and foundation of the truth.