J. M. Robertson,
A Short History of Christianity
“ Of the moral and intellectual unprogressiveness of Byzantium we may say, finally, that the Christian State, like those of the Saracens and the Turks, was in large measure kept stationary precisely by the relation of constant strife set up by the existence of the enemy. Each was the curse of its antagonist. And Christianity did no more to raise men above that deadlock of enmity than did Islam; nay, the further factor of Byzantine isolation represented by the rupture between the Greek and Latin Churches was a special product of the Christian system. ”
