"If the several Members, and the constituent Parts of this curious Machine, which the Mind always carries about her, have a brisk uniform Motion, and be so ballanc'd and adjusted as easily to perform all the Animal Functions, this gives a Briskness and Vivacity to the Mind, and entertains her with many agreeable Perceptions, which make her approve her present Situation, while she feels every Thing about her healthful and vigorous: But when the Blood and Spirits flag, or when the inward Motions of this human Machine happen to be disturbed, this affects the Mind with Pain, and gives her the uneasy Sensations of Trouble, Sickness, or Anguish, so that she is now discontented with her present Condition."
— Campbell, Archibald (1691-1756)
See Arete-Logia or, an Enquiry Into the Original of Moral Virtue; Wherein the False Notions of Machiavel, Hobbes, Spinoza, and Mr. Bayle, As They Are Collected and Digested by the Author of the Fable of the Bees, Are Examin'd and Confuted; ... To Which Is Prefix'd, a Prefatory Introduction, in a Letter to That Author. By Alexander Innes (Westminster: Printed by J. Cluer and A. Campbell, for B. Creake, 1728). <Link to ECCO><Link to Google Books>
Note, the work's publication history is detailed in the ODNB: Campbell wrote the work after reading Mandeville's Fable of the Bees, and in 1726 he entrusted the manuscript to Alexander Innes, who published the work under his own name. In 1730 Campbell asserted his authorship of the Enquiry in the "Advertisement" to his Discourse Proving that the Apostles were no Enthusiasts. In the 1733 republication of the Enquiry, Innes's duplicity was made public.