Source: Mathematical Thought from Ancient to Modern Times (1972), p. 495
“In this branch of study exactness is an essential feature; and mathematical difficulties must not be shrunk from when the nature of the subject leads to them.”
p, 125
"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)
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William John Macquorn Rankine 28
civil engineer 1820–1872Related quotes

The Notebooks of Leonardo da Vinci (1883), I Prolegomena and General Introduction to the Book on Painting

§ 2.
Linear Associative Algebra (1882)
Context: The branches of mathematics are as various as the sciences to which they belong, and each subject of physical enquiry has its appropriate mathematics. In every form of material manifestation, there is a corresponding form of human thought, so that the human mind is as wide in its range of thought as the physical universe in which it thinks.

Forward, as quoted by Mario Livio, Is God a Mathematician? (2009)
Ausdehnungslehre (1844)

Robert Chambers, Chambers's Information for the People (1875) Vol. 2 https://books.google.com/books?id=vNpTAAAAYAAJ

Source: The Mind and the Brain, 1907, p. 184
100 Years of Mathematics: a Personal Viewpoint (1981)
