MARCUS AURELIUS. MEDITATIONS. Book viii. 41.
THAT which is chief in every man's constitution, is, that he intend the common good. The second is, that he yield not to any lusts and motions of the flesh. For it is the part and privilege of the reasonable and intellective faculty, that she can so bound herself, as that neither the sensitive, nor the appetitive faculties, may not anywise prevail upon her. For both these are brutish. And therefore over both she challengeth mastery, and cannot anywise endure, if in her right temper, to be subject unto either.