It is no beast to be kept in a pond—one who has a promising future ? 今若縱之，恐蛟龍得云雨，終～也。(《三國演義》470) If we be at all careless I fear the recumbent dragon may fly to the skies;it is no beast to be kept in a pond.
非池中物fei chi zhong wu
be not confined to a small pond—one who has a great future
非池中物fēi chí zhōnɡ wù
不是長期呆在池塘中的動物。比喻有遠大抱負的人。one who has a promising future, a man of high aspirations