Aristotle
Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.
More quotes and aphorisms
He who learns must suffer. And even in our sleep...Clouds come floating into my life...There are good leaders who actively guide...The world breaks everyone, and afterward...I have not intended to denigrate or hurt the beliefs...Mathematics is the music of reason...