Speech on the Occasion of the Opening of the Governor General's Canadian Leadership Conference by Adrienne Clarkson in Winnipeg, archive.gg.ca. May 07, 2004.
Letter, 11 Nov. 1937, in Step by Step (1939) p. 186. Cf. the proverb "He who rides a tiger is afraid to dismount" (see Concise Oxford Dictionary of Proverbs under rides)