The most wasted day of all is that on which we have not laughed.
Pleasure can be supported by an illusion; but happiness rests upon truth.
I only study the things I like; I apply my mind only to matters that interest me. They'll be useful-or useless-to me or to others in due course, I'll be given-or not given-the opportunity of benefiting from what I've learned. In any case, I'll have enjoyed the inestimable advantage of doing things I like doing and following my own inclinations.
Pleasure may come from illusion, but happiness can come only of reality.
It is with happiness as with watches: the less complicated, the less easily deranged.