If any of you should ask me for an epitome of the Christian religion I should say that it is in one word - prayer. Live and die without prayer and you will pray long enough when you get to hell.

Religion is the sigh of the oppressed creature the heart of a heartless world and the soul of soulless conditions. It is the opium of the people.

Religion is the frozen thought of man out of which they build temples.

We have enslaved the rest of the animal creation and have treated our distant cousins in fur and feathers so badly that beyond doubt if they were able to formulate a religion they would depict the Devil in human form.

Whoever seeks to set one religion against another seeks to destroy all religion.

I say quite deliberately that the Christian religion as organized in its Churches has been and still is the principal enemy of moral progress in the world.

No religion has mandated killing others as a requirement for its sustenance or promotion.

Communism like any other revealed religion is largely made up of prophecies.

There is no surer sign of decay in a country than to see the rites of religion held in contempt.

Religion is for people who are scared to go to hell. Spirituality is for people who have already been there.