Without love we fall ill.

It often seems that the poet's derisive comment is not unjustified when he says of the philosopher: “With his nightcaps and the tatters of his dressing-gown he patches the gaps in the structure of the universe.

Religion belonged to the infancy of humanity. Now that humanity had come of age, it should be left behind.

Time spent with cats is never wasted.

The primitive stages can always be re-established; the primitive mind is, in the fullest meaning of the word, imperishable.

Opposition is not necessarily enmity; it is merely misused and made an occasion for enmity.

Like the physical, the psychical is not necessarily in reality what it appears to us to be.