Destruction is difficult. It is as difficult as creation.

I give culture this meaning: exercise of thought, acquisition of general ideas, habit of connecting causes and effects ... I believe that it means thinking well, whatever one thinks, and therefore acting well, whatever one does.

I turn and turn in my cell like a fly that doesn't know where to die.

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?

The abolition of the class struggle does not mean the abolition of the need to struggle as a principle of development.

I'm a pessimist because of intelligence, but an optimist because of will.

One must speak for a struggle for a new culture, that is, for a new moral life that cannot but be intimately connected to a new intuition of life, until it becomes a new way of feeling and seeing reality