Matthew 19:21

Verse 21. If thou wilt be perfect. The word perfect means complete in all its parts---finished, having no part wanting. Thus a watch is perfect; or complete, when it has all its proper wheels, and hands, and movements in order. Job was said to be perfect, Job 1:1; not that he was sinless, for he is afterwards reproved by God himself, Job 38:1-40:4 but because his piety was proportioned, and had a completeness of parts, he was a pious father, a pious magistrate, a pious neighbour, a pious citizen. His religion was not confined to one thing, but extended to all. Perfect means, sometimes, the filling up, or carrying out, or expression of a principle of action.