To theology, ... only what it holds sacred is true, whereas to philosophy, only what holds true is sacred.

The task of the modern era was the realization and humanization of God – the transformation and dissolution of theology into anthropology.

My only wish is…to transform friends of God into friends of man, believers into thinkers, devotees of prayer into devotees of work, candidates for the hereafter into students of the world, Christians who, by their own procession and admission, are "half animal, half angel" into persons, into whole persons.

Don’t only practice your art, but force your way into its secrets, for it and knowledge can raise men to the divine.

The essence of faith … is the idea that that which man wishes actually is: he wishes to be immortal, therefore he is immortal; he wishes for the existence of a being who can do everything which is impossible to Nature and reason, therefore such a being exists[.]

I would rather be a devil in alliance with truth, than an angel in alliance with falsehood.