Though the mills of God grind slowly, yet they grind exceeding small;
Though with patience He stands waiting, with exactness grinds He all.

Retribution. (Sinngedichte III, 2, 24, published c. 1654, translated by Henry Wadsworth Longfellow). Compare: "God's mill grinds slow, but sure", George Herbert. Jacula Prudentum. Sextus Empiricus is the first writer who has presented the whole of the adage cited by Plutarch in his treatise "Concerning such whom God is slow to punish".