On the other hand, the concept owes its meaning and its justification exclusively to the totality of the sense impressions which we associate with it.

The State idea is not according to my heart. I cannot understand why it is needed. It is connected with narrow-minded and economic obstacles. I believe it is bad. I have always been against it.

Common sense invents and constructs no less than its own field than science does in its domain. It is, however, in the nature of common sense not to be aware of this situation.

The rest of my life (as a 39 year old) I want to reflect on what life is.

Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.

The discovery of nuclear reactions need not bring about the destruction of mankind any more than the discovery of matches.

Only world law can assure progress towards a civilized peaceful community.