The picture, which emerges from the biblical material, is quite simple: folly is the opposite of wisdom, and a fool is the opposite of a wise person.
 Craig, K. (2003). Fool, Foolishness, and Folly. In C. Brand, C. Draper, A. England, S. Bond, E. R. Clendenen, & T. C. Butler (Eds.), Holman Illustrated Bible Dictionary (p. 590). Nashville, TN: Holman Bible Publishers.