Mbh 12.174.7c

Misery consists in the states that are intermediate between the two.[505] They who have succeeded in attaining to real felicity (which samadhi can bring), and who have become free from the pleasures and pains of this world, and who are destitute of envy, are never agitated by either the accession of wealth or its loss. They who have not succeeded in acquiring that intelligence which leads to real felicity, but who have transcended folly and ignorance (by the help of a knowledge of the scriptures), give way to excessive joy and excessive misery. Men destitute of all notions of right or wrong, insensate with pride and with success over others, yield to transports of delight like the gods in heaven.[506] Happiness must end in misery. Idleness is misery; while cleverness (in action) is the cause of happiness. Affluence and prosperity dwell in one possessed of cleverness, but not in one that is idle. Be it happiness or be it misery, be it agreeable or be it disagreeable, what comes to one should be enjoyed or endured with an unconquered heart. Every day a thousand occasions for sorrow, and hundred occasions for fear assail the man of ignorance and folly but not the man that is possessed of wisdom. Sorrow can never touch the man that is possessed of intelligence, that has acquired wisdom, that is mindful of listening to the instructions of his betters, that is destitute of envy, and that is self-restrained. Relying upon such an understanding, and protecting his heart (from the influences of desire and the passions), the man of wisdom should conduct himself here. Indeed, sorrow is unable to touch him who is conversant with that Supreme Self from which everything springs and unto which everything disappears.[507] The very root of that for which grief, or heartburning, or sorrow is felt or for which one is impelled to exertion, should, even if it be a part of one's body, be cast off.