“Virtue has to be earned and it has to be learned. Neither is virtue a permanent quality in human nature. It has to be cultivated continually and exercised from hour to hour and from day to day. The Founders looked to the home, the school, and the churches to fuel the fires of virtue from generation to generation.”

Source: A Stranger in Olondria (2013), Chapter 17, “The House of the Horse, My Palace” (p. 248)

Aristotle, 13.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 5: The Peripatetics

Source: Science and Hypothesis (1901), Ch. I: On the Nature of Mathematical Reasoning (1905) Tr. https://books.google.com/books?id=5nQSAAAAYAAJ George Bruce Halstead <br class="br">Context: The very possibility of the science of mathematics seems an insoluble contradiction. If this science is deductive only in appearance, whence does it derive that perfect rigor no one dreams of doubting? If, on the contrary, all the propositions it enunciates can be deduced one from another by the rules of formal logic, why is not mathematics reduced to an immense tautology? The syllogism can teach us nothing essentially new, and, if everything is to spring from the principle of identity, everything should be capable of being reduced to it. Shall we then admit that the enunciations of all those theorems which fill so many volumes are nothing but devious ways of saying A is A!... Does the mathematical method proceed from particular to the general, and, if so, how can it be called deductive?... If we refuse to admit these consequences, it must be conceded that mathematical reasoning has of itself a sort of creative virtue and consequently differs from a syllogism.&lt;!--pp.5-6

Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 29

38
Essays in Idleness (1967 Columbia University Press, Trns: Donald Keene)

in Impact of Advances in science and new technologies on society http://www.here-now4u.de/eng/impact_of_advances_in_science_.htm, 1998.

From the third book, "The Book of the Idiot"
The Pillow Book

XXI. That the Good are happy, both living and dead.
On the Gods and the Cosmos
Context: Souls that have lived in virtue are in general happy, and when separated from the irrational part of their nature, and made clean from all matter, have communion with the gods and join them in the governing of the whole world. Yet even if none of this happiness fell to their lot, virtue itself, and the joy and glory of virtue, and the life that is subject to no grief and no master are enough to make happy those who have set themselves to live according to virtue and have achieved it.

Dialogue on the Soul and the Resurrection, Patrologia Graeca 46.101-105