animal spirits

, vol.I, New York 2001, p.253:

This is likewise evident in such as walk in the night in their sleep, and do strange feats: these vapours move the phantasy, the phantasy the appetite, which moving the animal spirits causeth the body to walk up and down as if they were awake.

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.

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.