 Some of what we do in our interactions with other people is morally motivated but not altruistic. Suppose A has borrowed a book from B and has promised to return it within a week. When A returns the book by the deadline, his motive might be described as moral: he has freely made a promise, and he takes himself to have an obligation to keep such promises. His motive is simply to keep his word; this is not an example of altruism. But if A gives B a book as a gift, thinking that B will enjoy it and find it useful, he is acting simply out of a desire to benefit B. His motive in this case is altruistic. 