A quotation by Robert Recorde
Exercise is the beste instrument in learnyng.
The Whetstone of Witte
To avoide the tediouse repetition of these woordes: is equalle to: I will settle as I doe often in woorke use, a paire of paralleles, or gemowe [twin] lines of one lengthe: =, bicause noe .2. thynges, can be moare equalle.
Quoted in G Simmons Calculus Gems (New York 1992).
Besides the mathematical arts there is no infallible knowledge, except that it be borrowed from them.
Quoted in D MacHale, Comic Sections (Dublin 1993)
Wherefore in all great works are Clerks so much desired? ( Wherefore are Auditors so well-fed? ( What causeth Geometricians so highly to be enhaunsed?( Why are Astronomers so greatly advanced? ( Because that by number such things they find,( which else would farre excell mans minde.