Man first unconsciously and involuntarily creates God in his own image, and after this God consciously and voluntarily creates man in his own image.

The first and highest law must be the love of man to man. Homo homini Deus est - this is the supreme practical maxim, this is the turning point of the world's History.

The joys of theory are the sweetest intellectual pleasures of life

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

Faith is essentially intolerant ... essentially because necessarily bound up with faith is the illusion that one's cause is also God's cause.

It is as clear as the sun and as evident as the day that there is no God and that there can be none.

My only wish isto 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.