“...all perception is but a change in the concentration of hydrogen ions on the surface of the brain cells.”

“For some time there was a widely held notion (zealously fostered by the daily press) to the effect that the 'thinking ocean' of Solaris was a gigantic brain, prodigiously well-developed and several million years in advance of our own civilization, a sort of 'cosmic yogi', a sage, a symbol of omniscience, which had long ago understood the vanity of all action and for this reason had retreated into an unbreakable silence.”

“We didn't know each other well. I never had the time. Now I see that it doesn't make any difference. The ones who hurry and the ones who take their time all end up in the same place. Just don't have any regrets. No regrets.”

“Wandering across the vast room, I stopped at a set of shelves as high as the ceiling, and holding about six hundred volumes - all classics on the history of Soalris, starting with the nine volumes of Giese's monumental and already relatively obsolescent monograph. Display for its own sake was improbable in these surroundings. The collection was a respective tribute to the memory of the pioneers. I took down the massive volumes of Giese and sat leafing through them. Rheya had also located som reading matter. Looking over her shoulder, I saw that she had picked one of the many books brought out by the first expedition, the Interplanetary Cookery Book, which could have been the personal property of Giese himself. She was pouring over the recipes adapted to the arduous conditions of interstellar flight. I said nothing, and returned to the book resting on my knees. Solaris - Ten Years of Exploration had appeared as volumes 4-12 of the Solariana collection whose most recent additions were numbered in the thousands.”

“¿Sabes, por casualidad, si existió alguna vez una fe en un dios… imperfecto?(...) Es el único dios en el que yo podría creer, un dios cuya pasión no es una redención, un dios que no salva nada, que no sirve para nada: un dios que simplemente es.”

“Faith is, at one and the same time, absolutely necessary and altogether impossible.”

“Successive bursts of static came through the headphones, against a background of deep, low-pitched murmuring, which seemed to me the very voice of the planet itself.”