That which was from the beginning, that which we have heard, that which we have seen with our eyes, that which we saw, and our hands touched, concerning the Word of life
Verse 1 John 1:3 , chapter 2, "And hereby we do know that we know Him." Now, if I say I know God and don't keep His commandments, I am a liar. But here's how I can know that I really know Him, if I keep His commandments.