History is the long struggle of man, by exercise of his reason, to understand his environment and to act upon it. But the modern period has broadened the struggle in a revolutionary way. Man now seeks to understand, and act on, not only his environment, but himself; and this has added, so to speak, a new dimension to reason and a new dimension to history.

It is significant that the nationalization of thought has proceded everywhere pari passu with the nationalization of industry.

Study the historian before you begin to study the facts.

History in Burckhardt's words is 'the record of what one age finds worthy of note in another.' The past is intelligible to us only in light of the present; and we can fully understand the present only in light of the past. To enable man to understand the society of the past and to increase his mastery over the society of the present is the dual function of history.

What distinguishes the historian from the collector of historical facts is generalization.

Change is certain. Progress is not.

History consists of a corpus ascertained facts. The facts are available to the historian in documents, inscriptions and so on, like fish in the fishmonger's slab. The historian collects them, takes them home, and cooks and serves them in whatever style appeals to him.