The bad thing of war is, that it makes more evil people than it can take away.
Science is organized knowledge. Wisdom is organized life.
All trades, arts, and handiworks have gained by division of labor... Where the different kinds of work are not distinguished and divided, where everyone is a jack-of-all-trades, there manufactures remain still in the greatest barbarism.
With men, the state of nature is not a state of peace, but war.
There can be no doubt that all our knowledge begins with experience.
Our knowledge springs from two fundamental sources of the mind; the first is the capacity of receiving representations (receptivity for impressions), the second is the power of knowing an object through these representations (spontaneity [in the production] of concepts).