'Knowledge' 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].

(May he have the Lord's mercy in that day); and of all he did for me at Ephesus you have full knowledge.

If we go on to the end, then we will be ruling with him: if we say we have no knowledge of him, then he will say he has no knowledge of us:

But God's strong base is unchanging, having this sign, The Lord has knowledge of those who are his: and, Let everyone by whom the name of the Lord is named be turned away from evil.

and gentle when refuting opponents. After all, maybe God will allow them to repent and to come to a full knowledge of the truth,

Ever learning, and never able to come to the knowledge of the truth.

Yes, and all whose purpose is to be living in the knowledge of God in Christ Jesus, will be cruelly attacked.

and how from childhood you have known the sacred writings (Hebrew Scriptures) which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus [surrendering your entire self to Him and having absolute confidence in His wisdom, power and goodness].