"Opposite forces in mechanics tend to destroy one another. This is analogous to the case before us. The objects strictly connected with a passion are naturally fit for introducing ideas related to themselves; the passion acts in a contrary direction, and endeavours to keep the mind from running off to these: there is a perpetual struggle between the two."
— Gerard, Alexander (1728-1795)
(II.iii, pp. 165-9)
An Essay on Genius. By Alexander Gerard, D.D. Professor of Divinity in King's College, Aberdeen. (London: Printed for W. Strahan; T. Cadell, and W. Creech at Edinburgh 1774). <Link to ECCO>