"Ludwig Andreas von Feuerbach" was a German philosopher and anthropologist best known for his book The Essence of Christianity, which provided a critique of Christianity which strongly influenced generations of later thinkers, including both Karl Marx and Frederich Engels.
An associate of Left Hegelian circles, Feuerbach advocated liberalism, atheism, and materialism. Many of his philosophical writings offered a critical analysis of religion. His thought was influential in the development of dialectical materialism, where he is often recognized as a bridge between Hegel and Marx.More Ludwig Feuerbach on Wikipedia.
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.Ludwig Feuerbach