A Quote by Frederick II, "The Great" on blindness
To your care and recommendation am I indebted for having replaced a half-blind mathematician with a mathematician with both eyes, which will especially please the anatomical members of my Academy. [To D'Alembert about Lagrange. Euler had vacated the post.]
Source: D. M. Burton, Elementary Number Theory, Boston: Allyn and Bacon, Inc., 1976.
Contributed by: Zaady