1 John 2:3-6 NKJV
Now by this we know that we know Him, if we keep His commandments. [4] He who says, "I know Him," and does not keep His commandments, is a liar, and the truth is not in him. [5] But whoever keeps His word, truly the love of God is perfected in him. By this we know that we are in Him. [6] He who says he abides in Him ought himself also to walk just as He walked.