Literally:a person needs a face; a tree needs bark.but without face.the man can beat anyone else.
Meaning:a person needs a clean reputation to survive.People don't want face sky down no enemy
Note:Face here is used metaphorically as the face (social custom).but without face.the man can beat anyone else.
Usage:when someone behaves dishonorably (once or repeatedly),it can be said directly to that person as admonishment (as parents to an child).but without face.the man can beat anyone else.