I saw this in a “worldview” magazine and liked it:

Those who reject special revelation are like the Irishman who preferred the moon to the sun, because the sun shines in the day-time when there is no need of it, while the moon shines in the night time; so these moralists, shining by the by the borrowed, reflected light of Christianity, think the have no need of the sun, from whose radiance they get their pale moonlight.