"Because the impression is made quickly, it does not follow that it is strong: a susceptible memory, like a soft body, receives some impression at once, and because this impression is perceivable at once, we are at no pains to deepen it, we allow it to continue slight: when the memory is, as it were, of a harder contexture, the impression is not made without continued labour, it is deep before it can be at all taken notice of, and therefore it is permanent."
— Gerard, Alexander (1728-1795)
(II.ix, pp. 269-272)
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>