Date: 1697, 1700

"Nor think thy force too small, too weak thy Mind / Because to Clay unequally confined; / Its Power is wondrous Great; how small a Mass / Of Gold or Gems, exceeds vast Heaps of Brass?"

— Manilius, Marcus (fl. 1st Century AD), Creech, Thomas (1659-1700)

Date: April 26, 1695; 1708

"Meditating by one's self is like digging in the Mine; it often, perhaps, brings up maiden Earth, which never came near the Light before; but whether it contain any Metal in it, is never so well tried as in Conversation with a knowing judicious Friend, who carries about him the true Touch-stone, ...

— Locke, John (1632-1704)