For scholars and laymen alike it is not philosophy but active experience in mathematics itself that can alone answer the question: What is mathematics?
-- Richard Courant
   
Richard Courant   Name:
Richard Courant
Type:
Mathematician
Nationality:
German
Birth:
January 8, 1888
Death:
January 27, 1972
https://www.nutquote.com/quote/Richard_Courant