Be entirely tolerant or not at all; follow the good path or the evil one. To stand at the crossroads requires more strength than you possess.
Heinrich Heine

Ordinarily he was insane, but he had lucid moments when he was merely stupid.
Heinrich Heine

There are more fools in the world than there are people.
Heinrich Heine

Where they have burned books, they will end in burning human beings.
Heinrich Heine, From his play “Almansor” (1821)