The Essence of Mathematics....
The essence of mathematics is accuracy.
The Works of Walter Baghot
Travelers Insurance Company, 1891
The essence of mathematics is exact truthfulness.
Ellery W. Davis
Mathematical Supplement of School Science, 1903
The esssence of mathematics lies precisely in its freedom.
Mathematische Annalen, 1883
Source: Source: American Mathematical Monthly, March 2011, p. 197