One of the most widespread superstitions is that
every man has his own special, definite qualities; that a
man is kind, cruel, wise, stupid, energetic, apathetic, etc.
Men are not like that . . . Men are like rivers; the water is
the same in each, and alike in all; but every river is narrow
here, is more rapid there, here slower, there broader, now
clear, now cold, now dull, now warm. It is the same with
men. Every man carries in himself the germs of every
human quality and sometimes one manifests itself,
sometimes another, and the man often becomes unlike
himself—while still remaining the same man.

Auteur: Leo Tolstoy