One who is silent will not fall into transgressions of speech; one who maintains his simplicity will not fall into transgressions in the realm of action. A wooden horse cannot gallop, but it also does not stand in need of feeding.
木馬不能行，亦不費食；騏驥日馳千里，鞭箠不去其背。
Eric Henry
A fine horse gallops a thousand li in a day, but the whip never leaves its back.