“And so the Universe ended.”

Source: Extremely Loud and Incredibly Close (2005), p. 74

Source: Summa contra Gentiles (1259–1265) I, 1, 2

Source: Ways of Liberation: Essays and Lectures on the Transformation of Self (1983), p. 25
Context: We say in popular speech that we come into this world, but we do nothing of the kind. We come out of it. In the same way as the fruit comes out of the tree, the egg from the chicken, and the baby from the womb, we are symptomatic of the universe. Just as in the retina there are myriads of little nerve endings, we are the nerve endings of the universe.

"By the Numbers" (May 1973), in The Tragedy of the Moon (1973), p. 188
General sources

We conscious individuals manipulate it in manners best adapted to the satisfaction of our desires. We barricade its rivers, plow its seas, ingulf its vegetations, enslave its atmospheres, torture its soils, and perform upon it any other surgery or enormity that will help us in the satisfaction of these driving desires of ours. The inanimate is. if reason is not treason, the gigantic accessory of the consciousnesses that infest it. The animate environment, on the contrary, is related to each living being, not as means, but as end.
Source: Better-World Philosophy: A Sociological Synthesis (1899), The Social Problem, pp. 78–79

My Name Escapes Me (Penguin, 1997), 1st paperback edition, p. 57.

Ood Sigma, to the Tenth incarnation of the Doctor, in The End of Time [4.18] (1 January 2010) <!-- written with Steven Moffat though only the final scene, and not this one. -->

Thoughts and Glimpses (1916-17)