Animal spirits

This is likewiſe evident in ſuch as walke in the night in their ſleep, and doe ſtrange feats: theſe vapours moue the Phantaſie, the Phantaſie the Appetite, which mouing the animall''' ſpirits, cauſeth the body to walke vp and downe, as if they were awake.

His Brains will be found situated at the Head of the Os Pubis: His Animal Spirits acting more vigorously in that Part, than in the Upper Region.

you have all, I dare say, heard of the animal spirits, as how they are transfused from father to son &c. &c.—and a great deal to that purpose:– Well, you may take my word, that nine parts in ten of a man's sense of his nonsense, his successes and miscarriages in this world depend upon their motions and activity [...].

She had high animal spirits, and a sort of natural self-consequence, which the attention of the officers, to whom her uncle's good dinners, and her own easy manners recommended her, had increased into assurance.

Most, probably, of our decisions to do something positive, the full consequences of which will be drawn out over many days to come, can only be taken as a result of animal spirits — of a spontaneous urge to action rather than inaction, and not as the outcome of a weighted average of quantitative benefits multiplied by quantitative probabilities.

This flaw exists because the financial system necessary for capitalist vitality and vigor — which translates entrepreneurial animal spirits into effective demand for investment — contains the potential for runaway expansion, powered by an investment boom.

The existence of animal spirits does not imply that "irrational psychology" is the controlling factor in business and economics.

One of John Maynard Keynes's most famous terms, "animal spirits," is another name for much the same concept as irrational exuberance