"Are not these as plain proofs, that the passions of fear and hope are mixtures of grief and joy, as in optics it is a proof, that a coloured ray of the sun passing through a prism, is a composition of two others, when, as you diminish or encrease the quantity of either, you find it prevail proportionably more or less in the composition?"

— Hume, David (1711-1776)


Place of Publication
London
Publisher
Printed for John Noon
Date
January 1739
Metaphor
"Are not these as plain proofs, that the passions of fear and hope are mixtures of grief and joy, as in optics it is a proof, that a coloured ray of the sun passing through a prism, is a composition of two others, when, as you diminish or encrease the quantity of either, you find it prevail proportionably more or less in the composition?"
Metaphor in Context
The passions of fear and hope may arise when the chances are equal on both sides, and no superiority can be discovered in the one above the other. Nay, in this situation the passions are rather the strongest, as the mind has then the least foundation to rest upon, and is tossed with the greatest uncertainty. Throw in a superior degree of probability to the side of grief, you immediately see that passion diffuse itself over the composition, and tincture it into fear. Encrease the probability, and by that means the grief, the fear prevails still more and more, till at last it runs insensibly, as the joy continually diminishes, into pure grief. After you have brought it to this situation, diminish the grief, after the same manner that you encreased it, by diminishing the probability on that side, and you'll see the passion clear every moment, till it changes insensibly into hope; which again runs, after the same manner, by slow degrees, into joy, as you encrease that part of the composition by the encrease of the probability. Are not these as plain proofs, that the passions of fear and hope are mixtures of grief and joy, as in optics it is a proof, that a coloured ray of the sun passing through a prism, is a composition of two others, when, as you diminish or encrease the quantity of either, you find it prevail proportionably more or less in the composition? I am sure neither natural nor moral philosophy admits of stronger proofs.
(II.iii.9)
Categories
Provenance
Past Masters
Citation
Published anonymously with vols. I and II appearing in January in 1739 and vol. III appearing in November of 1740. Only 1 entry in the ESTC (1740).

David Hume, A Treatise of Human Nature. Being an Attempt to Introduce the Experimental Method of Reasoning into Moral Subjects. 3 vols. (London: Printed for John Noon, 1739; Thomas Longman, 1740). <Link to ESTC><Link to ECCO><Link to ECCO-TCP><Link to OLL>

Reading David Hume, A Treatise of Human Nature, eds. D. F. and M. J. Norton (Oxford: OUP, 2000). Searching in Past Masters and OLL editions.
Date of Entry
09/29/2003
Date of Review
07/20/2009

The Mind is a Metaphor is authored by Brad Pasanek, Assistant Professor of English, University of Virginia.