Date: 1731

"That the Intelligent Principle, or Soul, resides in the brain, where all the Nerves, or Instruments of Sensation, terminate, like a Musician in a finely fram'd and well-tun'd Organ Case; that these Nerves are like Keys, which, being struck on or touch'd, convey the Sound and Harmon...

— Cheyne, George (1671-1743)

Date: 1731

"Feeling is nothing but the Impulse, Motion, or Action of Bodies, gently or violently impressing the Extremities or Sides of the Nerves, of the Skin of other parts of the Body, which by their Structure and Mechanism, convey this Motion to the Sentient Principle in the Brain, or the Musician."

— Cheyne, George (1671-1743)

Date: 1733

"OR, in a more gross Similitude, the Intelligent Principle is like a Bell in a Steeple, to which there are an infinite Number of Hammers all around it, with Ropes of all Lengths, terminating or touching at every Point of the Surface of the Trunk or Case, one of whose Extremities being pull'd or t...

— Cheyne, George (1671-1743)

Date: 1733

"I have formerly suggested, that the best Similitude I can form of the Nature and Actions of this Principle upon the Organs of its Machin, is that of a skillful Musician playing on a well-tun'd Instrument."

— Cheyne, George (1671-1743)

Date: January 1739

"Now, if we consider the human mind, we shall find that with regard to the passions, it is not of the nature of a wind instrument of music, which, in running over all the notes, immediately loses the sound after the breath ceases; but rather resembles a string-instrument, where, after each s...

— Hume, David (1711-1776)

Date: 1742

"What satisfaction, when he looks within, to find the most turbulent passions tuned to just harmony and concord, and every jarring sound banished from this enchanting music!"

— Hume, David (1711-1776)

Date: 1748, 1754

"He will learn to transfer the Numbers of Poetry to the Harmony of the Mind, and of well-governed Passions."

— Fordyce, David (bap. 1711, d. 1751)

Date: 1748, 1754

"For, being now destitute of that Counter-poise which held them at a due pitch, they grow turbulent, peevish, and revengeful, the Cause of constant Restlessness and Torment, sometimes flying out into a wild delirious Joy, at other times settling into a deep splenetic Grief. The Concert between Re...

— Fordyce, David (bap. 1711, d. 1751)

Date: 1748, 1749

"As the string of a violin or harpsichord trembles and vibrates, so the fibres or strings of the brain struck by the undulating rays of sound, are excited to return or repeat the words that touched them."

— Julien Offray de La Mettrie (1709-1751)

Date: Tuesday, November 20, 1750

"Yet, if we consider the conduct of those sententious philosophers, it will often be found, that they repeat these aphorisms, merely because they have somewhere heard them, because they have nothing else to say, or because they think veneration gained by such appearances of wisdom, but that no id...

— Johnson, Samuel (1709-1784)