Everything that is really great and inspiring is created by the individual who can labor in freedom.

I have not eaten enough of the tree of knowledge, though in my profession I am obligated to feed on it regularly.

The finest emotion of which we are capable is the mystic emotion. Herein lies the germ of all art and all true science. Anyone to whom this feeling is alien, who is no longer capable of wonderment and lives in a state of fear is a dead man.

The concept of marriage must have been thought up by an unimaginative pig.

Three great forces rule the world: stupidity, fear and greed.

By academic freedom I understand the right to search for truth and to publish and teach what one holds to be true. This right also implies a duty: one must not conceal any part of what one has recognized to be true.

This change in the conception of reality is the most profound and the most fruitful that physics has experienced since the time of Newton. Refering to James Clerk Maxwell's contributions to physics.