The thing is, not to stop questioning.

... knowledge must continually be renewed by ceaseless effort, if it is not to be lost. It resembles a statue of marble which stands in the desert and is continually threatened with burial by the shifting sand. The hands of service must ever be at work, in order that the marble continue to lastingly shine in the sun. To these serving hands mine shall also belong.

The word God is for me nothing more than the expression and product of human weaknesses.

The state is made for man, not man for the state.... That is to say, the state should be our servant and not we its slaves

Nationalism is an infantile disease. It is the measles of mankind.

When you trip over love, it is easy to get up. But when you fall in love, it is impossible to stand again.

It may affront the military-minded person to suggest a regime that does not maintain any military secrets.