One of these is a change of faith. The abandonment of the ancestral religion, which is the mother of caste spirit and organization, especially when the newly accepted faith repudiates openly caste and all that belongs to it, inevitably leads to expulsion from caste. In most cases this has resulted upon conversion to either Christianity or Mohammedanism. But this is not as universal as we could wish or as many suppose, as we shall see later on. It may be seen how, in a mass movement of a large body of men toward Christianity, for instance, the people may easily, and would naturally, carry with them into the new faith many of their old customs and habits, including much that pertains to, and is of the essence of, caste. Roman Catholicism has interpreted caste chiefly from a social standpoint, and has therefore regarded it as a social institution which can be adapted to, and adopted into, the Christian religion. Protestantism, or, at least, Anglo-Saxon Protestantism, has regarded caste as primarily and dominantly a religious institution, whose spirit antagonizes fundamentally our faith, and which must be opposed at all points. Hence it is a part of the pledge of every one who enters into the Protestant fellowship in India that he will eschew and oppose caste at all times. And it may be said that, though Hinduism loves dearly compromise and evasion, it has in the main held that a man who has accepted the Christian faith and has been publicly baptized into its conviction of the "fatherhood of God and the brotherhood of all men," has no place in its own caste system, and it consistently deals with him as with an outcast. As we have already seen, every man who has travelled abroad has lost thereby caste and has to undergo expiation before reinstatement. It matters not how thoroughly he has tried to preserve caste customs during his travels and in the foreign land, he is regarded by all as a _de facto_ outcast. Marrying a widow is also an act which severs caste ties and places a man under the ban. Of course, this applies not to the few castes which allow widow-remarriage. But as the bulk of Hindus deny the right of a widow to remarry (though there is no caste obstacle to a widower taking unto himself a new virgin wife every year of his life), a man cannot enter into an alliance with a widow without losing caste thereby. Beef-eating is regarded as so heinous a sin that no member of a respectable caste would expect consideration for a moment. And yet Dr. J. H. Barrows has said that the famous Swamy, Vivekanantha, when with him at Chicago, ate a whole plateful of beef in his presence and with a great deal of relish. But he, of course, had graduated out of the ordinary level of Hindu-hood into the sacred heights of Swamyhood, in which a man is exempt from the mean limitation of caste, and when the vulgar sins of common Hindu life are transmuted into the ordinary blessings and privileges of saintdom.