"The attributes of God have been carefully explored. But the Devil's attributes have been left vague. I think I've found one of them. It is he who puts the prices on things." "Doesn't God put a price on things?" "No. One of his attributes is magnanimity. But the Devil is a setter of prices, and a usurer, as well. You buy from him at an agreed price, but the payments are all on time, and the interest is charged on the whole of the principal, right up to the last payment, however much of the principal you think you have paid off in the meantime."