We find the most terrible form of atheism, not in the militant and passionate struggle against the idea of God himself, but in the practical atheism of everyday living, in indifference and torpor. We often encounter these forms of atheism among those who are formally Christians. – Nicolai A. Berdyaev

Forth from his dark and lonely hiding-place, (Portentous sight!) the owlet Atheism, sailing on obscene wings athwart the noon, drops his blue-fringed lids, and holds them close, and hooting at the glorious sun in Heaven, cries out, Where is it? – Samuel Taylor Coleridge

Those thinkers who cannot believe in any gods often assert that the love of humanity would be in itself sufficient for them; and so, perhaps, it would, if they had it. – G. K. Chesterton