Gw mau tau atau diterjemahkan: dari Agama adalah candu

Ateisme itu alami dan bagian tak terpisahkan dari Marxisme, dari sebuah teori dan praktik dari sosialisme ilmiah.

Dalam About the attitude of the working party toward the religion'', ia menulis:

Religion is the opium of the people: this saying of Marx is the cornerstone of the entire ideology of Marxism about religion. All modern religions and churches, all and of every kind of religious organizations are always considered by Marxism as the organs of bourgeois reaction, used for the protection of the exploitation and the stupefaction of the working class.