3. _Whatever motive in man's complex nature makes him desire things more or less, becomes for the time, and in so far, an economic motive._ These various social and spiritual motives sometimes work positively, in the direction of magnifying man's desire for things; sometimes negatively, to diminish it. If we are to understand economic action, we must take men as they are. A religious motive that leads men to refrain from the eating of meat or to eat fish in preference on certain days, is a fact which the economist has but to accept, for it is sure to affect the value of meat and fish at that place and time. Moral convictions, whatever be their origin, whether due to the teaching of parents, to unconscious influences, or to native temperament, may be quite as effective as the pangs of hunger in determining what men desire. Therefore, while these various motives are primarily social or moral or religious, they may be said to be secondarily economic motives, and they may become in certain cases the most important influences of which the economist must take account. CHAPTER 3 WEALTH AND WELFARE § I. THE RELATION OF MEN AND MATERIAL THINGS TO ECONOMIC WELFARE [Sidenote: Man is the center of economic reasoning] 1. _The gratifying of economic wants depends on things outside of the man who feels the wants._ Man is to himself the center of the world. He groups things and estimates things with reference to their bearing on his desires, be these what are called selfish or unselfish. If we were discussing the economics of an inferior species of animals, things would be grouped in a very different way. But economics being the study of man's welfare, everything must be judged from his standpoint, and things are or are not of economic importance according as they have relation to his wants and satisfactions. Things needful for any of the lower animals are spoken of as "ministering to welfare" in the economic sense only in case these animals are useful to men. Examples are the mulberry-tree on which the silkworm feeds, the flower visited by the honey-bee. In the same view some men are seen to minister to the welfare of other men and therefore bear the same relation for the moment to the welfare of the others as do material things. In any case we study man's welfare as affected by the world which surrounds him. [Sidenote: Physical nature is an unchangeable fact]