This quote is written / told by Robert Frost between March 26, 1874 and January 29, 1963. He was a famous Poet from USA.
The author also have 80 other quotes.
"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"