He said, in part:
The biggest challenge facing the great teachers and communicators of history is not to teach history itself, nor even the lessons of history, but why history matters. How to ignite the first spark of the will o'the wisp, the Jack o'lantern, the ignis fatuus [foolish fire] beloved of poets, which lights up one source of history and then another, zigzagging across the marsh, connecting and linking and writing bright words across the dark face of the present. There's no phrase I can come up that will encapsulate in a winning sound-bite why history matters. We know that history matters, we know that it is thrilling, absorbing, fascinating, delightful and infuriating, that it is life.
The full speech may be read at the original site.