Cassius Jackson Keyser Quotes and Sayings  Page 1

“Absolute certainty is a privilege of uneducated minds and fanatics.  It is, for scientific folk, an unattainable ideal.”
 Cassius Jackson Keyser 
“If you ask ... the man in the street ... the human significance of mathematics, the answer of the world will be, that mathematics has given mankind a metrical and computatory art essential to the effective conduct of daily life, that mathematics admits of countless applications in engineering and the natural sciences, and finally that mathematics is a most excellent instrumentality for giving mental discipline... [A mathematician will add] that mathematics is the exact science, the science of exact thought or of rigorous thinking.”
 Cassius Jackson Keyser 
“[The] humanization of mathematical teaching, the bringing of the matter and the spirit of mathematics to bear not merely upon certain fragmentary faculties of the mind, but upon the whole mind, that this is the greatest desideratum is. I assume, beyond dispute.”
 Cassius Jackson Keyser 
“The validity of mathematical propositions is independent of the actual worldthe world of existing subjectmattersis logically prior to it, and would remain unaffected were it to vanish from being. Mathematical propositions, if true, are eternal verities.”
 Cassius Jackson Keyser 
“Mathematics, even in its present and most abstract state, is not detached from life. It is just the ideal handling of the problems of life.”
 Cassius Jackson Keyser 
“Mathematics is, in many ways, the most precious response that the human spirit has made to the call of the infinite.”
 Cassius Jackson Keyser
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