discipline: the corrective training, by teaching or by hardship, that shapes a person toward wisdom and right living
This is one of the central words of the wisdom writings. It names discipline in the full sense a good parent or teacher means it: not punishment for its own sake, but the whole shaping process that turns a raw, foolish person into a wise and upright one. Because that shaping happens in two ways, the word reaches across both. Sometimes it is the steady instruction that a child or student takes in, the lessons and correction that build sound judgment over time. Other times it is the sharper experience of being corrected, rebuked, or made to suffer, so that a wrong path is broken off before it ruins the person.
The wisdom teachers tie the two together on purpose. To love a child is to discipline him (Proverbs 13:24); to refuse discipline is to despise oneself (Proverbs 15:32). The same word covers a father's patient teaching and his readiness to use the rod, because both aim at the one goal of a wise and whole life.
The prophets and Job stretch the word toward God's dealings with people. When the Lord sends hardship, it can be his discipline, meant to turn a nation or a sufferer back to him (Deuteronomy 11:2, Job 5:17). At its sharpest the word can name outright punishment, as when Israel calls the blows it has suffered a cruel chastening (Jeremiah 30:14). Yet even there the background idea is correction rather than mere revenge: the suffering is supposed to teach.