Knowledge is limited.

But without deeper reflection one knows from daily life that one exists for other people--first of all for those upon whose smiles and well-being our own happiness is wholly dependent, and then for the many, unknown to us, to whose destinies we are bound by the ties of sympathy.

Anybody who really wants to abolish war must resolutely declare himself in favor of his own country's resigning a portion of sovereignty in place of international institutions.

A person starts to live when he can live outside himself.

Ninety nine failed solutions equals a gain of 99 pieces of information.

Each of us visits this Earth involuntarily, and without an invitation. For me, it is enough to wonder at the secrets.

Politics is far more complicated than physics.