John Wolpert

“The intentions of a tool are what it does. A hammer intends to strike, a vise intends to hold fast, a lever intends to lift. They are what it is made for. But sometimes a tool may have other uses that you don't know. Sometimes in doing what you intend, you also do what the knife intends, without knowing.”
― Philip Pullman, His Dark Materials - The Trilogy: The Golden Compass / The Subtle Knife / The Amber Spyglass