As far as dealing with people, can you find a law that exceeds this one in excellence?

“And just as you want men to do to you, you also do to them likewise” (Luke 6:31).

Who can or would argue against such a rule? People call it the Golden Rule because of its magnificence. No other rule of life outdoes it.
Live by it, and see how it affects the people around you, and how it helps your relationships with them.