“The whole prospect of Gaelic appals me, the more I think of the difficulties and the likelihood of its extinction in a generation or two. A … language with … no modern prose of any account, no philosophical or technical vocabulary to speak of, no correct usage except among old people and a few university students, colloquially full of gross English idiom lately taken over, exact shades of meanings of most words not to be found in any of its dictionaries and dialectally varying enormously (what chance of the appreciation of the overtones of poetry, except amongst a handful?) Above all, all economic, social and political factors working against it, and, with that, the notorious, moral cowardice of the Highlanders themselves.”

"The Imaginative Mind in Art" (1978)

In his convocation address at the Sri Venkateshwara University, at Tirupathi, quoted in "Jayachamaraja Wodeyar – A Princely scholar".

(1635) as quoted by W. W. Rouse Ball, A History of the Study of Mathematics at Cambridge https://books.google.com/books?id=Pl32YkKFIhsC (1889) pp. 41-42.

Sorley MacLean, 1982, quoted in Krause, Corinna. Eadar Dà Chànan: Self-Translation, the Bilingual Edition and Modern Scottish Gaelic Poetry https://www.era.lib.ed.ac.uk/bitstream/handle/1842/3453/Krause2007.pdf?sequence=1&isAllowed=y
Letters and interviews

On the Uses and Transformations of Linear Algebra (1875)

Sabhal Mòr Ostaig Lecture (December 19, 2007)

Sabhal Mòr Ostaig Lecture (December 19, 2007)

As quoted in Bigeometric Calculus: A System with a Scale-Free Derivative (1983) by Michael Grossman, and in Single Variable Calculus (1994) by James Stewart.

Source: Democracy Ancient And Modern (Second Edition) (1985), Chapter 2, Athenian Demagogues, p. 44