![source: Wikimedia Commons Portrait of Evariste Galois](https://platonicrealms.com/sites/default/files/images/prime/portraits/galois.jpg)
Evariste Galois
1811–1832
French mathematician
Unfortunately what is little recognized is that the most worthwhile scientific books are those in which the author clearly indicates what he does not know; for an author most hurts his readers by concealing difficulties.