It is no beast to be kept in a pond—one who has a promising future ❍ 今若纵之，恐蛟龙得云雨，终～也。(《三国演义》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
不是长期呆在池塘中的动物。比喻有远大抱负的人。one who has a promising future, a man of high aspirations