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

[Theology is a] web of contradictions and delusions.

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...

Christianity set itself the goal of fulfilling man’s unattainable desires, but for that very reason ignored his attainable desires. By promising man eternal life, it deprived him of temporal life, by teaching him to trust...

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

Though I myself am an atheist, I openly profess religion in the sense just mentioned, that is, a nature religion. I hate the idealism that wrenches man out of nature; I am not ashamed of...

The power of thought is the light of knowledge, the power of will is the energy of character, the power of heart is love. Reason, love and power of will are perfections of man.

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

Öteki dünya inancı fantezinin hakikatine duyulan inançtan başka bir şey değildir, tıpkı tanrı inancının, insanın duygu dünyasının hakikatine ve sonsuzluğuna olan inanç olması gibi. Ya da: Tanrı inancının, sadece insanın soyut özüne duyulan inanç olması...

Wherever morality is based on theology, wherever right is made dependent on divine authority, the most immoral, unjust, infamous things can be justified and established.

God did not, as the Bible says, make man in His image; on the contrary man, as I have shown in The Essence of Christianity, made God in his image.

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