人心不足蛇吞象 [ㄖㄣˊ ㄒㄧㄣ ㄅㄨˋ ㄗㄨˊ ㄕㄜˊ ㄊㄨㄣ ㄒㄧㄤˋ; ren2 xin1 bu4 zu2 she2 tun1 xiang4] a man who is never content is like a snake trying to swallow an elephant (idiom) ◄ ►