十善是十恶的反面。十恶是什么呢？身有三恶--杀、盗、淫。意有三恶--贪、瞋、痴。口有四恶--绮语、妄言、恶口、两舌，几乎占了十恶的一半。

The ten good deeds are just the opposite of ten bad deeds. The ten bad deeds are: killing, stealing, and sexual misconduct, which are done by the body; greed, hatred, and ignorance, which belong to the mind; and lying, loose speech, harsh speech, and divisive speech, which are committed by the mouth. Notice that the offenses of the mouth account for almost half of the ten.