I do not think you need fear that the study of a dead period, however prolonged and however sympathetic, need prove an indulgence in nostalgia or an enslavement to the past. In the individual life, as the psychologists have taught us, it is not the remembered but the forgotten past that enslaves us. I think the same is true of society. To study the past does indeed liberate us from the present, from the idols of our own market-place. But I think it liberates us from the past too. I think no class of men are less enslaved to the past than historians.

– De Descriptione Temporum : Inaugural Lecture from The Chair of Mediaeval and Renaissance Literature at Cambridge University, 1954