The Faded Sun Trilogy by C.J. Cherryh
The reading of this book (these books) was well-timed for me. It was so apt and I was so engrossed that the household grew jealous of the book: my youngest tried to take it apart, and, when that failed, the cats tried to eat it on two separate occasions. But I would not be turned away, and I was well-rewarded.
Pertinent quotes for me:
"We do not despise your knowledge," said the she'pan. "We simply do not desire it." (p. 125)
He found no limit to what senses could absorb. He felt. He was not numb. He only wished to be... (p. 185)
And from the war there were also men like himself, thousands like himself, who did not know what they were, or from what world; war-born, war-oriented. War was all his life; it had made him move again and again in retreating from it, a succession of refuge creches, of tired overworked women; and then toward it, in schools that prepared him not for trade and commerce but for the front lines. His own accent was unidentifiable, a mingling of all the places he had lived. He had no place. He had for allegiance now nothing but his humanity.
And himself. (p. 322)
All, all those little lights which were suns, and some cloudy aggregates of suns, themselves reduced to dust motes by distance which reached out from himself, who was the center of the universe, and then not- an insignificance, less than the mote of a world, far less than a sun, infinitely less than the vast galaxies, and the distance, the cold, deep distance that never stopped, forever. (p. 513)
He understood one rule, that waste was death; that what one gave the desert it never gave back, to world's end.
He did what he knew to do, which was yield nothing. (p. 571)
Of course, the meaning is to yield nothing that you need, which is implied since the he is of a kind that do not encumber themselves with anything but what is needed- the absolute bare minimum. Determine what that is, hold it to you, and never, no matter what, let it go. Let everything else in the world go, freely and without grief, but never what you need.
Time was not... like beads on a string, event and event and event, from which Darks could sever them, breaking the string. There was only the Now, which extended and embraced all the Past which she contained and the pan'en contained, and all the past which had brought Kutath to this moment; and all the future toward which she led.
She was not single, but universal; she inhaled the all and breathed it through her pores. She Saw, and directed, and it was therefore necessary to do very little, for from the Center, threads ran far. It was that, to believe in one's own Sight. There was no anger, for nothing could cross her. There was no true pride, for she was all-containing. (p. 594)
Humans[,] accustomed to the factual instabilities of their perceptions, even lied, which was to give deliberate inaccuracy to memory, past or future. They existed in complete flux; their memories periodically purged themselves of facts: this was perhaps a necessary reflex in a species which remembered things that had not yet happened and which falsified what had occurred or might occur. (p. 603)