Let us say, moreover, parenthetically, that from a few words of what precedes a marked separation might be inferred between the two classes of historians which does not exist in our mind. No one is a good historian of the patent, visible, striking, and public life of peoples, if he is not, at the same time, in a certain measure, the historian of their deep and hidden life; and no one is a good historian of the interior unless he understands how, at need, to be the historian of the exterior also. The history of manners and ideas permeates the history of events, and this is true reciprocally. They constitute two different orders of facts which correspond to each other, which are always interlaced, and which often bring forth results. All the lineaments which providence traces on the surface of a nation have their parallels, sombre but distinct, in their depths, and all convulsions of the depths produce ebullitions on the surface. True history being a mixture of all things, the true historian mingles in everything.

Man is not a circle with a single centre; he is an ellipse with a double focus. Facts form one of these, and ideas the other.