Christianity and Islam C. H. Becker

A comparison of Christianity with Muhammedanism or with any other religion must be preceded by a statement of the objects with which such comparison is undertaken, for the possibilities which lie in this direction are numerous. Hence the object of such comparisons is to trace the course of analogous developments and the interaction of influence and so to increase the knowledge of religion in general or of our own religion in particular. Это и многое другое вы найдете в книге Christianity and Islam (C. H. Becker)