We will turn, therefore, to the less ambitious problem, what the behaviour of men themselves reveals as the purpose and object of their lives, what they demand of life and wish to attain in it. The answer to this can hardly be in doubt: they seek happiness, they want to become happy and to remain so. There are two sides to this striving, a positive and a negative; it aims on the one hand at eliminating pain and discomfort, on the other at the experience of intense pleasures. In its narrower sense the word ‘happiness’ relates only to the last. Thus human activities branch off in two directions—corresponding to this double goal—according to which of the two they aim at realizing, either predominantly or even exclusively. As we see, it is simply the pleasure-principle which draws up the programme of life’s purpose. This principle dominates the operation of the mental apparatus from the very beginning; there can be no doubt about its efficiency, and yet its programme is in conflict with the whole world, with the macrocosm as much as with the microcosm. It simply cannot be put into execution, the whole constitution of things runs counter to it; one might say the intention that man should be ‘happy’ is not included in the scheme of ‘Creation’. What is called happiness in its narrowest sense comes from the satisfaction—most often instantaneous—of pent-up needs which have reached great intensity, and by its very nature can only be a transitory experience. When any condition desired by the pleasure-principle is protracted, it results in a feeling only of mild comfort; we are so constituted that we can only intensely enjoy contrasts, much less intensely states in themselves.[7] Our possibilities of happiness are thus limited from the start by our very constitution. It is much less difficult to be unhappy. Suffering comes from three quarters: from our own body, which is destined to decay and dissolution, and cannot even dispense with anxiety and pain as danger-signals; from the outer world, which can rage against us with the most powerful and pitiless forces of destruction; and finally from our relations with other men. The unhappiness which has this last origin we find perhaps more painful than any other; we tend to regard it more or less as a gratuitous addition, although it cannot be any less an inevitable fate than the suffering that proceeds from other sources.