For the religious the holy is truth, for the philosophic the truth is holy.

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

What yesterday was still religion is no longer such today; and what today is atheism, tomorrow will be religion.

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

Religion is the dream of the human mind. But even in dreams we do not find ourselves in emptiness or in heaven, but on earth, in the realm of reality; we only see real things in the entrancing splendor of imagination and caprice, instead of in the simple daylight of reality and necessity.

As we expand our knowledge of good books, we shrink the circle of men whose company we appreciate.

It is not as in the Bible, that God created man in his own image. But, on the contrary, man created God in his own image.