I fear animals regard man as a creature of their own kind which has in a highly dangerous fashion lost its healthy animal reason - as the mad animal, as the laughing animal, as the weeping animal, as the unhappy animal.

Whoever turns away from us might not offend us in doing so perhaps, but he certainly offends our followers.

With the strength of his spiritual sight and insight the distance, and as it were the space, around man continually expands: his world grows deeper, ever new stars, ever new images and enigmas come into view.

We do not place especial value on the possession of a virtue until we notice its total absence in our opponent.

Only with the ultimate knowledge of all things will man have come to know himself. For things are but the boundaries of man.

We forget our guilt when we have confessed it to another, but the other does not usually forget it.

Does not the discipline of the scientific spirit just commence when one no longer harbours any conviction?