Some philosophers "think, that the brains of old men, grown callous by length of time, are, like hard wax, equally tenacious of old impressions, and unsusceptible of new."
Of Memory and Imagination [from Dissertations Moral and Critical]
At least 2 entries in ESTC (1783).<br>
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Beattie, James. <u>Dissertations Moral and Critical</u> (London: Printed for Strahan, Cadell, and Creech, 1783). Facsimile-Reprint: Friedrich Frommann Verlag, Stuttgart-Bad Cannstatt, 1970. &lt;<a href="http://books.google.com/books?id=xP5BAAAAYAAJ">Link to Google Books</a>&gt;