The Hindu idea is that self means happiness, that the depth of the self is happiness. This means that all this outer structure, the physical body, the breath, the senses of perception, all of which help to make man, are most important; but his inner being can be called by only one name, and that is happiness. It is natural, therefore, that everyone should be seeking for happiness, though not knowing where to get it and always seeking for it outside himself; and instead of finding the happiness which is his own he tries to get the happiness of another; but what happens is that he can neither get happiness from another nor can he give it. By trying to get it from another he causes sorrow to that one, and the sorrow comes back to him.