Date: 1709, 1714

"We polish one another, and rub off our Corners and rough Sides by a sort of amicable Collision. To restrain this, is inevitably to bring a Rust upon Mens Understandings."

— Cooper, Anthony Ashley, third earl of Shaftesbury (1671-1713)

Date: 1820

"And they [Stewart, Tracy, Cabanis] ask why may not the mode of action called thought, have been given to a material organ of peculiar structure, as that of magnetism is to the needle, or of elasticity to the spring by a particular manipulation of the steel."

— Jefferson, Thomas (1743-1826)