"A Jewish definition of holiness may be put in these terms: Holiness does not lie in the ascetic, saintly withdrawal from life, or in excessive denial to oneself of all human pleasures, or in the repression of all human drives. It consists, rather, of full participation in the stream of human community life, sharing the joyous as well as the sorrowful experiences which life has to offer, denying to oneself no legitimate pleasures; but at the same time so developing one's sense of discernment as to be able to distinguish and choose the right from the wrong, the true from the false, the good from the bad, the sacred from the profane, the pure from the impure, and the clean from the unclean. The greater the sense of ethical-moral-religious discrimination, the greater the holiness of the individual."
Rabbi Hayim Donin, To Be a Jew: A Guide to Jewish Observance in Contemporary Life (New York: Basic Books, 1994 [1972]), 36.