True Christian joy, Erasmus writes, comes from a mania —a divine madness that makes one despise worldly goods, embrace suffering, and seek union with God. This is the "folly" praised by St. Paul ("If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise"). Here, Erasmus inverts the entire classical ideal. Plato’s wise king is a fool in heaven’s eyes; the simple, ecstatic believer is truly wise.
In the sweltering summer of 1509, the great humanist Desiderius Erasmus of Rotterdam rode on horseback from Italy to England. To pass the time and distract himself from a painful kidney ailment, he conceived a small, satirical pamphlet. That pamphlet, written in the home of his friend Thomas More, became The Praise of Folly ( Stultitiae Laus )—one of the most influential, dangerous, and delightful books of the Renaissance. Available today as a free PDF through numerous digital archives (such as Project Gutenberg and the Internet Archive), this slim volume remains a timeless mirror held up to human pretension. It argues a radical thesis: that without folly, there is no joy, no society, and no salvation. The Speaker and the Paradox The genius of the work lies in its narrator: Folly herself ( Stultitia ), a goddess dressed as a jester. Standing before a crowded audience, she delivers a mock encomium (a praise speech) in her own honor. This allows Erasmus to employ a complex double irony. When Folly claims that "folly brings happiness," the reader must discern how much of this is true and how much is satirical exaggeration.