“Unlike the physicist, the psychologist … investigates processes that belong to the same order—perception, learning, thinking—as those by which he conducts his investigation.”

An Essay on the Beautiful
Context: Perhaps, the good and the beautiful are the same, and must be investigated by one and the same process; and in like manner the base and the evil. And in the first rank we must place the beautiful, and consider it as the same with the good; from which immediately emanates intellect as beautiful. Next to this, we must consider the soul receiving its beauty from intellect, and every inferior beauty deriving its origin from the forming power of the soul, whether conversant in fair actions and offices, or sciences and arts. Lastly, bodies themselves participate of beauty from the soul, which, as something divine, and a portion of the beautiful itself, renders whatever it supervenes and subdues, beautiful as far as its natural capacity will admit.
Let us, therefore, re-ascend to the good itself, which every soul desires; and in which it can alone find perfect repose. For if anyone shall become acquainted with this source of beauty he will then know what I say, and after what manner he is beautiful. Indeed, whatever is desirable is a kind of good, since to this desire tends. But they alone pursue true good, who rise to intelligible beauty, and so far only tend to good itself; as far as they lay aside the deformed vestments of matter, with which they become connected in their descent. Just as those who penetrate into the holy retreats of sacred mysteries, are first purified and then divest themselves of their garments, until someone by such a process, having dismissed everything foreign from the God, by himself alone, beholds the solitary principle of the universe, sincere, simple and pure, from which all things depend, and to whose transcendent perfections the eyes of all intelligent natures are directed, as the proper cause of being, life and intelligence. With what ardent love, with what strong desire will he who enjoys this transporting vision be inflamed while vehemently affecting to become one with this supreme beauty! For this it is ordained, that he who does not yet perceive him, yet desires him as good, but he who enjoys the vision is enraptured with his beauty, and is equally filled with admiration and delight. Hence, such a one is agitated with a salutary astonishment; is affected with the highest and truest love; derides vehement affections and inferior loves, and despises the beauty which he once approved. Such, too, is the condition of those who, on perceiving the forms of gods or daemons, no longer esteem the fairest of corporeal forms. What, then, must be the condition of that being, who beholds the beautiful itself?

Source: He said that Muammar Gaddafi's death should be investigated, as he shouldn't have been killed, (October 2011) http://rt.com/politics/lavrov-interview-russia-libya-us-439/

Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970)

Source: Philosophical Sketches (1962), Ch. 9, p. 160

Guide for the Perplexed (c. 1190), Introduction
Context: You must know that if a person, who has attained a certain degree of perfection, wishes to impart to others, either orally or in writing, any portion of the knowledge which he has acquired of these subjects, he is utterly unable to be as systematic and explicit as he could be in a science of which the method is well known. The same difficulties which he encountered when investigating the subject for himself will attend him when endeavouring to instruct others: viz., at one time the explanation will appear lucid, at another time, obscure: this property of the subject appears to remain the same both to the advanced scholar and to the beginner. For this reason, great theological scholars gave instruction in all such matters only by means of metaphors and allegories.

Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970)

The New Marvel in Photography (1896)
Context: I was working with a Crookes tube covered by a shield of black cardboard. A piece of barium platino-cyanide paper lay on the bench there. I had been passing a current through the tube, and I noticed a peculiar black line across the paper. … The effect was one which could only be produced, in ordinary parlance, by the passage of light. No light could come from the tube, because the shield which covered it was impervious to any light known, even that of the electric arc. … I did not think; I investigated. I assumed that the effect must have come from the tube, since its character indicated that it could come from nowhere else. I tested it. In a few minutes there was no doubt about it. Rays were coming from the tube which had a luminescent effect upon the paper. I tried it successfully at greater and greater distances, even at two metres. It seemed at first a new kind of invisible light. It was clearly something new, something unrecorded.

Ulrichs in autobiographical manuscript of 1861, cited in Hubert Kennedy (1988), Ulrichs: The Life and Works of Karl Heinrich Ulrichs. Pioneer of the Modern Gay Movement. Boston: Alyson. p. 44; As cited in: Kennedy (1997, 4)

1 St. Tr. (N. S.) 162.
Trial of Sir Francis Burdett (King v. Burdett) (1820)