Often foolishness finds its cure in the conflict with reality. Thus, the foolish belief that I can skip class and not study will conflict with the reality of grades. After an F I will hopefully be cured of my foolishness.
Other forms of foolishness cannot be cured until it is too late to make a correction. Psalm 90 mentions one such problem:
So teach us to number our days that we may get a heart of wisdom.
There is a foolishness that comes from thinking the temporary is permanent. My days are short, but I easily and foolishly will live as if the days will go on forever.
This foolishness cannot be cured with experience, because by the experience intervenes, it will be too late.
There is also the foolishness that comes from failing to realize that I am permanent. To live one’s life as if there is no eternity before me is also foolishness. I must learn to number my days, because there will be a judgment.
Such a day may be a joy if I am to acquitted. But to do so, I must be reconciled to the judge:
27 And just as it is appointed for man to die once, and after that comes judgment,
28 so Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him.