Early Use
The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. "Give me a place to stand, and I shall move the Earth with it" is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria).
It is assumed that in ancient Egypt, constructors used the lever to move and uplift obelisks weighting more than 100 tons.
Read more about this topic: Lever
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“In the early days of the world, the Almighty said to the first of our race “In the sweat of thy face shalt thou eat bread”; and since then, if we except the light and the air of heaven, no good thing has been, or can be enjoyed by us, without having first cost labour.”
—Abraham Lincoln (1809–1865)
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