One's most essential attributes cannot be defined by math,…

“Although a poem be not made by counting of syllables upon the fingers, yet "numbers" is the most poetical synonym we have for verse, and "measure" the most significant equivalent for beauty, for goodness, and perhaps even for truth. Those early and profound philosophers, the followers of Pythagoras, saw the essence of all things in number, and it was by weight, measure, and number, as we read in the Bible, that the Creator first brought Nature out of the void.”

George Santayana (1863–1952) 20th-century Spanish-American philosopher associated with Pragmatism

Interpretations of Poetry and Religion (1900), p. 251
Other works

“(about Math) Too many little numbers on one page!”

Daniel Radcliffe (1989) English actor

http://www.movietome.com/people/86509/daniel-radcliffe/trivia.html

“The way in which the irrational numbers are usually introduced is based directly upon the conception of extensive magnitudes—which itself is nowhere carefully defined—and explains number as the result of measuring such a magnitude by another of the same kind. Instead of this I demand that arithmetic shall be developed out of itself.”

Richard Dedekind (1831–1916) German mathematician

Footnote: The apparent advantage of the generality of this definition of number disappears as soon as we consider complex numbers. According to my view, on the other hand, the notion of the ratio between two numbers of the same kind can be clearly developed only after the introduction of irrational numbers.
Stetigkeit und irrationale Zahlen (1872)

“One should not interpret the word “Revolution” in its literal sense. Various meanings and significances are attributed to this word, according to the interests of those who use or misuse it.”

Bhagat Singh (1907–1931) Indian revolutionary

Letter published in The Tribune (25 December 1929) http://naxalrevolution.wordpress.com/2007/03/23/bhagat-singh-on-the-slogan-of-‘long-live-revolution’/
Context: One should not interpret the word “Revolution” in its literal sense. Various meanings and significances are attributed to this word, according to the interests of those who use or misuse it. For the established agencies of exploitation it conjures up a feeling of blood stained horror. To the revolutionaries it is a sacred phrase.

“Among those [Syrian] refugees are no doubt a significant number of ISIS terrorists.”

James Clapper (1941) US government official

Misquoted by Ted Cruz. According to the source, "Clapper said it was a “huge concern” that ISIS could try to infiltrate the refugees. Clapper also expressed confidence in the United States’ ability to screen refugee applicants."
Misattributed
Source: [Farley, Robert, Cruz Misquotes Clapper on Refugees, https://www.factcheck.org/2015/10/cruz-misquotes-clapper-on-refugees/, factcheck.org, 27 July 2018]