and ignorant tourists travel from far countries to look at Ravenna and San Marco, Palermo and Pisa, Assisi, Cordova, Chartres, with vague notions about the force that created them, but with a certain surprise that a social mind of such singular energy and unity should still lurk in their shadows.
The tourist more rarely visits Constantinople or studies the architecture of Sancta Sofia, but when he does, he is distinctly conscious of forces not quite the same. Justinian has not the simplicity of Charlemagne. The eastern empire showed an activity and variety of forces that classical Europe never possessed. The navy of Nicephoras Phocas in the tenth century would have annihilated in half an hour any navy that Carthage or Athens or Rome ever set afloat. The dynamic scheme began by asserting rather recklessly that between the Pyramids (B. C. 3000), and the Cross (A. D. 300), no new force affected western progress, and antiquarians may easily dispute the fact; but in any case the motive influence, old or new, which raised both Pyramids and Cross was the same attraction of power in a future life that raised the dome of Sancta Sofia and the Cathedral at Amiens, however much it was altered, enlarged, or removed to distance in space. Therefore, no single event has more puzzled historians than the sudden, unexplained appearance of at least two new natural forces of the highest educational value in mechanics, for the first time within record of history. Literally, these two forces seemed to drop from the sky at the precise moment that the Cross on one side and the Crescent on the other, proclaimed the complete triumph of the Civitas Dei. Had the Manichean doctrine of Good and Evil as rival deities been orthodox, it would alone have accounted for this simultaneous victory of hostile powers.
Of the compass, as a step towards demonstration of the dynamic law, one may confidently say that it proved, better than any other force, the widening scope of the mind, since it widened immensely the range of contact between nature and thought. The compass educated. This must prove itself as needing no proof. Of Greek fire and Gunpowder, the same thing cannot be said, for they have the air of accidents due to the attraction of religious motives. They belong to the spiritual world; or to the doubtful ground of Magic which lay between Good and Evil. They were chemical forces, mostly explosives, which acted and still act
