"At each stage of human existence the adult man is off on his quest of his holy grail, the way of life he seeks by which to live. At his first level he is on a quest for automatic physiological satisfaction. At the second level he seeks a safe mode of living, and this is followed in turn, by a search for heroic status, for power and glory, by a search for ultimate peace; a search for material pleasure, a search for affectionate relations, a search for respect of self, and a search for peace in an incomprehensible world. And, when he finds he will not find that peace, he will be off on his ninth level quest. As he sets off on each quest, he believes he will find the answer to his existence. Yet, much to his surprise and much to his dismay, he finds at every stage that the solution to existence is not the solution he has come to find. Every stage he reaches leaves him disconcerted and perplexed. It is simply that as he solves one set of human problems he finds a new set in their place. The quest he finds is never ending."

-- Dr. Clare W. Graves

Levels of Existence, Forms of Being 

"I am not saying in this conception of adult behavior that one style of being, one form of human existence is inevitably and in all circumstances superior to or better than another form of human existence, another style of being. What I am saying is that when one form of being is more congruent with the realities of existence, then it is the better form of living for those realities. And what I am saying is that when one form of existence ceases to be functional for the realities of existence then some other form, either higher or lower in the hierarchy, is the better form of living. I do suggest, however, and this I deeply believe is so, that for the overall welfare of total man's existence in this world, over the long run of time, higher levels are better than lower levels and that the prime good of any society's governing figures should be to promote human movement up the levels of human existence." 

-- Dr. Clare W. Graves