The physician says to a household: "Here is a great realm of food. Eat that which agrees with you. The same kinds of food do not agree with all people. If you grow healthy on the food that I loathe, that is the food for you, although it disagrees with me; and if I grow healthy on the food that you loathe, that is the food for me, although it disagrees with you." And it is very much so in the matter of believing. All cannot believe the same things, or cannot believe things in the same way.