be careful

Also found in: Acronyms, Idioms.
See: beware, hedge, heed
References in classic literature ?
That is hemp seed he is sowing; be careful to pick up every one of the seeds, or else you will repent it.
We must be careful not to confuse the physical and the moral.
You had better be careful, Sir,' said the little judge, with a sinister look at the witness.