'Know' in the Bible

This is why I suffer as I do. Still, I am not ashamed; for I know Him [and I am personally acquainted with Him] whom I have believed [with absolute trust and confidence in Him and in the truth of His deity], and I am persuaded [beyond any doubt] that He is able to guard that which I have entrusted to Him until that day [when I stand before Him].

You are aware of the fact that all who are in [the province of] Asia turned away and deserted me, Phygelus and Hermogenes among them.

the Lord grant to him that he may find mercy from the Lord on that [great] day. You know very well how many things he did for me and what a help he was at Ephesus [you know better than I can tell you].

But have nothing to do with foolish and ignorant speculations [useless disputes over unedifying, stupid controversies], since you know that they produce strife and give birth to quarrels.

He must correct those who are in opposition with courtesy and gentleness in the hope that God may grant that they will repent and be led to the knowledge of the truth [accurately understanding and welcoming it],