Thematic Bible: Why the lord chastens people

It is for your training that you undergo these things; God is acting to you as a father does to his sons; for what son does not have punishment from his father? But if you have not that punishment of which we all have our part, then you are not true sons, but children of shame. And again, if the fathers of our flesh gave us punishment and had our respect, how much more will we be under the authority of the Father of spirits, and have life? read more.
For they truly gave us punishment for a short time, as it seemed good to them; but he does it for our profit, so that we may become holy as he is.

But if we were true judges of ourselves, punishment would not come on us. But if punishment does come, it is sent by the Lord, so that we may be safe when the world is judged.