Earth is afflicted and wretched, it is hard to teach, it has no discrimination. Unenlightened men, who suffer from the effects of past deeds, cause great pain in a world full of pain already, for in earth souls are individually embodied. If, thinking to gain praise, honour, or respect ... or to achieve a good rebirth . . . or to win salvation, or to escape pain, a man sins against earth or causes or permits others to do so. . . . he will not gain joy or wisdom. . . . Injury to the earth is like striking, cutting, maiming, or killing a blind man . . . Knowing this man should not sin against earth or cause or permit others to do so. He who understands the nature of sin against earth is called a true sage who understands karma. . .

(The Panchadasi)