Author and neurologist Oliver Sacks writes of his religious experience:

There had been some religious feeling, of a childish sort, in the years before the war. When my mother lit the Sabbath candles, I would feel, almost physically, the Sabbath coming in, being welcomed, descending like a soft mantle over the earth. I imagined, too, that this occurred all over the universe—the Sabbath descending on far-off star systems and galaxies, enfolding them all in the peace of God.

But when I was suddenly abandoned by my parents (as I saw it), my trust in them, my love for them, was rudely shaken, and with this my belief in God, too. What evidence was there, I kept asking myself, for God's existence? I determined on an experiment to resolve the matter decisively: I planted two rows of radishes side by side in the vegetable garden, and asked God to bless one or curse one, whichever he wished, so that I might see a clear difference between them. The two rows of radishes came up identical, and this was proof for me that no God existed. But I longed now even more for something to believe in.