Date: 1751, 1777

"They [cruel ideas] still haunt his solitary hours, damp his most aspiring thoughts, and show him, even to himself, in the most contemptible and most odious colours imaginable."

— Hume, David (1711-1776)

Date: 1765

"The best Way to prove the Clearness of our Mind is by shewing its Faults; as when a Stream discovers the Dirt at the Bottom, it convinces us of the Transparency and Purity of the Water."

— Anonymous