The limited character of the conditions under which most humans have to live and the adverse character of so many of the experiences they meet with, the millions of hearts filled with tormenting restlessness and frustrated longings and the millions of heads filled with uncertainties and strivings, the inescapable orbit of pleasures followed by pains and of attractions succeeded by repulsions, preclude the attainment or retainment of real happiness. The unsatisfactory final character of life's pleasures and the disappointments in the expectations it fosters are not so apparent, however, to the inexperienced young as to the well-experienced aged. Nevertheless, we have yet to meet the man, however young and enthusiastic he may be, who is fully satisfied with what he has got, or who is not dissatisfied because of what he has not got.
-- Notebooks Category 13: Human Experience > Chapter 3 : Youth and Age > # 66
