“At certain epochs of history, there are pleiades of great men; at other epochs, there are pleiades of vagabonds. But do not confound the epoch, the moment of Louis Bonaparte, with the 19th century: the toadstool sprouts at the foot of the oak, but it is not the oak.”

8 March 1935

Antropologia Pedagogica (1910), translated as Pedagogical Anthropology (1913), p. 259.
Context: It seems as though a new epoch were in preparation, a truly human epoch, and as though the end had almost come of those evolutionary periods which sum up the history of the heroic struggles of humanity; an epoch in which an assured peace will promote the brotherhood of man, while morality and love will take their place as the highest form of human superiority. In such an epoch there will really be superior human beings, there will really be men strong in morality and in sentiment. Perhaps in this way the reign of woman in approaching, when the enigma of her anthropological superiority will be deciphered. Woman was always the custodian of human sentiment, morality and honour, and in these respects man always has yielded women the palm.

“Il dovere dei giovani” (“Duty of Young People”), in Alfredo Rocco’s Scritti e discorsi politici, Milan: Giuffrè. Vol. 2, (1938) p. 526

Einstein's special theory of relativity, which explains the indeterminateness of the frame of space and time, crowns the work of Copernicus who first led us to give up our insistence on a geocentric outlook on nature; Einstein's general theory of relativity, which reveals the curvature or non-Euclidean geometry of space and time, carries forward the rudimentary thought of those earlier astronomers who first contemplated the possibility that their existence lay on something which was not flat. These earlier revolutions are still a source of perplexity in childhood, which we soon outgrow; and a time will come when Einstein's amazing revelations have likewise sunk into the commonplaces of educated thought.
The Theory of Relativity and its Influence on Scientific Thought (1922), p. 31-32

Traits and Trials of Early Life (1836)

31 July 1937

Watchword for the Roman Republic (1849)

Source: Classification and indexing in science (1958), Other Chapters, p. 147 Cited in: Madeline M. Henderson (1966) Cooperation, convertibility, and compatibility among information systems: a literature review. p. 72.