瞻前顾后

瞻前顾后 [zhān qián gù hòu]

1. ■ look ahead into the future and back into the past; be overcautious and indecisive; look before and behind [after]; look fore and aft [forward and backward]; take into account both past experience and the situation that may possibly arise in the future; think over carefully before doing sth.; tread (as) on eggs; watch in front and behind; weigh one's steps by thinking of consequences:

做事要瞻前顾后， 不要这样鲁莽。 Look before you leap. Don't be so foolhardy.