'If one's wise,' he said at last, 'one doesn't ask whether it makes any sense. One does one's work and leaves the problem of evil to one's metabolism. That makes sense all right.'
'Because it's not oneself,' said Sebastian. 'Not human, but a part of the cosmic order. That's why animals have no metaphysical worries. Being identical with their physiology, they know there's a cosmic order. Whereas human beings identify themselves with money-making, say, or drink, or politics, or literature. None of which has anything to do with the cosmic order. So naturally they find that nothing makes sense.'

Aldous Huxley, Time Must Have A Stop (Triad/Panther, 1982) pp. 298-299