MARCUS AURELIUS. MEDITATIONS. Book xi. 19.
HE that hath not one and the selfsame general end always as long as he liveth, cannot possibly be one and the selfsame man always. But this will not suffice except thou add also what ought to be this general end. For as the general conceit and apprehension of all those things which upon no certain ground are by the greater part of men deemed good, cannot be uniform and agreeable, but that only which is limited, and restrained by some certain proprieties and conditions, as of community: that nothing be conceived good, which is not commonly, and publicly good : so must the end also that we propose unto ourselves, be common and sociable. For he that doth direct all his own private motions and purposes to that end, all his actions will be agreeable and uniform; and by that means will be still the same man.