We were instructed by the Son of God, how best to live the Christian life! Love God wholesouled and your neighbour as yourself!
If you do this even in your heart you don't steal from him, kill him, take what he has, ruin his family or lie to him, or about him! That's the point of it, you do nothing to him or her that you don't want them to do to you.
Life is simplified by this and honoured. Who is your neighbour, you may ask?