He was thinking alone, and seriously racking his brain to find a direction for this single force four times multiplied, with which he did not doubt, as with the lever for which Archimedes sought, they should succeed in moving the world, when some one tapped gently at his door.
-- Alexandre Dumas
   
Alexandre Dumas   Name:
Alexandre Dumas
Type:
Dramatist
Nationality:
French
Birth:
July 24, 1802
Death:
December 5, 1870
https://www.nutquote.com/quote/Alexandre_Dumas