恶人自有恶人磨

Explanation: Grinding: torture. Refers to the vicious more vicious people who naturally have to torture him 　　Usage: As object, attribute; for oral 　　Source: Ming Feng Meng, "Yu Shiming made" VIII: "A Good Man is also good to save the event, needle goes." 　　Examples: Qing Shi Yukun "Chivalric Heroes" 13 back: "God in the window to listen to this show, told myself: 's ~, then good.'" Thesaurus:  Strong in the more strongly in the hands, Baddie More Baddie abrade, However strong you are, ther is always someone stronger.