The deepest theorems often have the simplest proofs - if you look at them from the right angle.
仲弓问仁。孔子说:“出门时要象会见贵宾一样庄重,建工程时要象举行盛大祭典一样严肃。自己不愿做的,不要强加于人。同事中相处融洽,亲属中和睦友爱。”仲弓说:“我虽不才,愿照此办理。”
The rules of art are not arbitrary; they are founded in reason and in the nature of things.