Jerome : "And wisdom is better than weapons, but a single rogue can ruin a great deal of good. "Now he also takes wisdom in preference to strength and says that it is worth more in battle than weapons. But if there is one fool, however small and worthless, he will repeatedly destroy riches and great wealth by his stupidity. But because the Hebrew can also be read as: 'and he who sins once, will lose much goodness', much righteousness will be lost in return and virtues will follow in turn, and he who has one, has all [Cfr. Cic de Offic. II, 35.]; and he who sins at one time, leaves himself open to all vices [Cfr. Iac. 2, 10.]. — Commentary on Ecclesiastes