Oh, that's nothing – I could coach a coal scuttle to be Senior Wrangler.
when complimented about coaching his one pupil scoring higher than his rival's pupils at Peterhouse Tripos, as quoted by Cargill Gilston Knott (1911). Life and scientific work of Peter Guthrie Tait. Cambridge University Press. p. 11.
[Examiners] spend their lives in discovering which pages of a text-book a man ought to read and which will not be likely to 'pay'.Peter Guthrie Tait
The next grand extensions of mathematical physics will, in all likelihood, be furnished by quaternions.Peter Guthrie Tait