1 John 2:3-6

3 and in this we know that we have known him, if his commands we may keep;
4 he who is saying, `I have known him,' and his command is not keeping, a liar he is, and in him the truth is not;
5 and whoever may keep his word, truly in him the love of God hath been perfected; in this we know that in him we are.
6 He who is saying in him he doth remain, ought according as he walked also himself so to walk.
Young's Literal Translation is in the public domain.