 He greatly admired the playing of the Canadian pianist Glenn Gould, with whom he shared, in addition to an extraordinary independence of mind, a vision of Canadian spiritual life (which for Doull encompassed such spheres as politics, art, religion, and philosophy) that combined both a receptivity to the possibilities of the new world and a strong sense of continuity with the European past.Hans-Georg Gadamer expressed surprise at having encountered a person of such comprehensive erudition in North America.Emil Fackenheim called him the only Hegelian.