Happiness, as is evident, depends partly upon external circumstances and partly upon oneself. We have been concerned in this volume with the part which depends upon oneself, and we have been led to the view that so far as this part is concerned the recipe for happiness is a very simple one. It is thought by many, among whom I think we must include Mr Krutch, whom we considered in an earlier chapter, that happiness is impossible without a creed of a more or less religious kind. It is thought by many who are themselves unhappy that their sorrows have complicated and highly intellectualised sources. I do not believe that such things are genuine causes of either happiness or unhappiness; I think they are only symptoms. The man who is unhappy will, as a rule, adopt an unhappy creed, while the man who is happy will adopt a happy creed; each may attribute his happiness or unhappiness to his beliefs, while the real causation is the other way round. Certain things are indispensable to the happiness of most men, but these are simple things: food and shelter, health, love, successful work and the respect of one’s own herd.