The quest in man.

What does man quest for? What does man want to affirm, when he encounters new experiences? Is there a reason that he wants to encounter new experiences, or is there no reason? After a while new experiences become old experiences, which is normal. How will the old experiences in the future, be any different from the old experiences of the present? I mean, the old experiences in the future, will loose their novelty, once they loose their association with 'new'. Is the quest, for which man embarks, just a momentary psychological satiation, for however long the moment lasts? What does one gain, after one has finished with new experiences, and can experience no more? Perhaps, man tries to satiate his need of pleasure, by indulging in different pleasurable experiences. What is notable is, that when man is on his deathbed, he may be content with the pleasurable experiences, and may see his many experiences in the world, as a justification to his death in the end.