If you beat your head against the wall, it is your head that breaks and not the wall.

The crisis consists precisely in the fact that the old is dying and the new cannot be born

The challenge of modernity is to live without illusions and without becoming disillusioned.

Man is above all else mind, consciousness -- that is, he is a product of history, not of nature.

To tell the truth is revolutionary.

The old is dying and the new cannot be born. In this interregnum there arises a great diversity of morbid symptoms.

Is it better to work out consciously and critically one's own conception of the world and thus, in connection with the labours of one's own brain, choose one's sphere of activity, take an active part in the creation of the history of the world, be one's own guide, refusing to accept passively and supinely from outside the moulding of one' own personality?