People see only their good deeds saying, "I have done this good deed." But they do not see their evil deeds saying, "I have done this evil deed" or "This is called evil." But this (tendency) is difficult to see. One should think like this: "It is these things that lead to evil, to violence, to cruelty, anger, pride and jealousy. Let me not ruin myself with these things." And further, one should think: "This leads to happiness in this world and the next."

Edicts of Ashoka (c. 257 BC)