'Simple' in the Bible

The disclosure of your words illuminates, providing understanding to the simple.

If you scourge a scoffer, the simple person may learn to be discreet; rebuke a discerning man and he will gain understanding.

I am speaking in simple terms because of the frailty of your human nature. Just as you once offered the parts of your body as slaves to impurity and to greater and greater disobedience, so now, in the same way, you must offer the parts of your body as slaves to righteousness that leads to sanctification.