(Romans 3:23) None of us have flawlessly obeyed the commandments, so that is not the means of obtaining salvation, yet we know that we have come to know Him/already know Him/already saved/demonstrative evidence if we "keep" (Greek word "tereo" - guard, observe, watch over) His commandments. (1 John 2:3)
As to your "come to know Him"---
1 John 2:3-4---King James Version
3 And hereby we do know that we know him, if we keep his commandments.
4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not i