The writer of Proverbs says that the opposite of wisdom is foolishness and the opposite of a wise person is a fool.
the word fool often means someone with low intelligence, but in biblical
usage, fools may have a high I.Q. and a reputation for success. What makes them fools is that they ignore
God's wisdom, preferring to follow the shifting dictates of the crowd or their
own fallible opinions. While fools often
consider themselves clever -- people who know how to beat the system -- their
cleverness all too often leads to their ruin.
Their penchant for distorting the truth, their lack of discernment and
discipline, their unwillingness to exhibit self-control and their apparent
delight in throwing caution to the wind put them on a path to disaster.
Bill Hybels in Making Life Work: Putting God's Wisdom into Action