Hasidim/Chasidim is the plural of Hasid (חסיד), meaning "pious". The honorific "Hasid" was frequently used as a term of exceptional respect in the Talmudic and early medieval periods. In classic Rabbinic literature it differs from "Tzadik"-"righteous", by instead denoting one who goes beyond the legal requirements of ritual and ethical Jewish observance in daily life. The literal meaning of "Hasid" derives from Chesed-"kindness", the outward expression of love for God and other people. This spiritual devotion motivates pious conduct beyond everyday limits. The devotional nature of its description lent itself to a few Jewish movements in history being known as "Hasidim". Two of these derived from the Jewish mystical tradition, as it could tend towards piety over legalism.