312. What is a monk’s wealth? Concerning this, one lives with the mind filled with love and compassion, sympathetic joy and equanimity, suffusing the first, second, third and fourth quarters of the world with them. One abides suffusing the whole world, upwards, downwards, across, everywhere, with a mind filled with love, compassion, sympathetic joy and equanimity, abundant, unbounded, without hatred, without ill-will. This is a monk’s wealth.
D.III,78 (DN 26)