'Self controlled' in the Bible

Now an overseer must be blameless and beyond reproach, the husband of one wife, self-controlled, sensible, respectable, hospitable, able to teach,

Women must likewise be worthy of respect, not malicious gossips, but self-controlled, [thoroughly] trustworthy in all things.

Older men are to be temperate, dignified, sensible, sound in faith, in love, in steadfastness [Christlike in character].

to be sensible, pure, makers of a home [where God is honored], good-natured, being subject to their own husbands, so that the word of God will not be dishonored.

It teaches us to reject ungodliness and worldly (immoral) desires, and to live sensible, upright, and godly lives [lives with a purpose that reflect spiritual maturity] in this present age,