'Chastening' in the Bible

And ye have quite forgotten the exhortation which speaks to you as to sons: My son, despise not the chastening of the Lord, nor faint when reproved by him;

Ye endure for chastening, God conducts himself towards you as towards sons; for who is the son that the father chastens not?

But if ye are without chastening, of which all have been made partakers, then are ye bastards, and not sons.

But no chastening at the time seems to be matter of joy, but of grief; but afterwards yields the peaceful fruit of righteousness to those exercised by it.