Date: 1721, 1722

"This noble passion is indeed always engraved upon their hearts; but imagination and education mould it a thousand ways."

— Charles-Louis de Secondat, Baron de La Brède et de Montesquieu (1689-1755)

Date: 1739

"Yes, Speech is Animi Index, & Speculum; 'tis the Interpreter of the Heart, 'tis the Image of the Soul."

— Baker, Henry (1698-1774); Miller James (1706-1744); Molière (1622-1673)

Date: 1761

The mind of the hearer might very well be a tabula rasa, free from every prejudice, and like soft wax, susceptible of every impression; and with all this, not yield to truth itself, proposed in the manner it is every day proposed, under the appearance of falsehood."

— Batteaux, Charles (1713-1780)

Date: 1761

"The image of Eloisa, never to be erased from my mind, shall be my shield, and render my soul invulnerable."

— Rousseau, Jean-Jacques (1712-1778); Kenrick, William (1729/30-1779)

Date: 1774, rev. 1787, 1779 in English

"But I had found it: I did find and know an exalted mind, which raised me beyond myself, and made me all that I am capable of being. All the powers of my soul were extended, and the deep sentiment which nature engraved on my heart, was unfolded."

— Goethe, Johann Wolfgang (1749-1832)