In 1625 John Donne said: ‘As Manna tasted to every man like that he liked best, so doe the Psalmes administer instruction, and satisfaction, to every man, in every emergency and occasion.’

I’m not sure where Donne got this idea about manna, but I wonder whether C.S. Lewis had it in mind when he wrote in The Lion, the Witch and the Wardrobe about Turkish delight that was enchanted, so ‘anyone who had once tasted it would want more and more of it, and would even, if they were allowed, go on eating it till they killed themselves’.