"For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe"
1 Corinthians, 1:21
"We [are] fools for Christ's sake, but ye [are] wise in Christ; we [are] weak, but ye [are] strong; ye [are] honourable, but we [are] despised"
1 Corinthians, 4:10
Holy Fools (by Jim Forest)
God's Holy Fool - Blessed Feofil of the Kiev-Caves Lavra
Symeon the Holy Fool: Leontius's Life and the Late Antique City (by Derek Krueger)