Christianity has in fact long vanished, not only from the reason but also from the life of mankind, and it is nothing more than a fixed idea.

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

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

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

In the consciousness of the infinite, the conscious subject has for his object the infinity of his own nature.

What else is the power of melody but the power of feeling? Music is the language of feeling; melody is audible feeling - feeling communicating itself.

If therefore my work is negative, irreligious, atheistic, let it be remembered that atheism — at least in the sense of this work — is the secret of religion itself; that religion itself, not indeed on the surface, but fundamentally, not in intention or according to its own supposition, but in its heart, in its essence, believes in nothing else than the truth and divinity of human nature.