Thematic Bible: Why the lord chastens people

It is for chastening that ye endure; God dealeth with you as with sons; for what son is there whom his father chasteneth not? But if ye are without chastening, whereof all have been made partakers, then are ye bastards, and not sons. Furthermore, we had the fathers of our flesh to chasten us, and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live? read more.
For they indeed for a few days chastened us as seemed good to them; but he for our profit, that we may be partakers of his holiness.

But if we discerned ourselves, we should not be judged. But when we are judged, we are chastened of the Lord, that we may not be condemned with the world.