An atheist is a sick person

Rudolf Steiner:  "In Spiritual Science — where the existence of the Divine in the realm of the supersensible cannot be a matter of doubt — the question may be asked : What is it that makes a man deny the existence of the Divine — the Father God in the Trinity? Spiritual Science shows us that in every case where a man denies the Father God — that is to say, a Divine Principle in the world such as is acknowledged, for example, in the Hebrew religion — in every such case there is an actual physical defect, a physical sickness, a physical flaw in the body. To be an atheist means to the spiritual scientist to be sick in some respect. It is not, of course, a sickness which doctors cure — indeed they themselves very often suffer from it — neither is it recognized by modern medicine ... but Spiritual Science finds that there is an actual sickness in a man who denies what he should be able to feel, in this case, not through his soul-nature but through his actual bodily constitution. If he denies that which gives him a healthy bodily feeling, namely that the world is pervaded by Divinity, then, according to Spiritual Science, he is a sick man, sick in body."

Source: October 16, 1918 GA 182