This indefiniteness of statement and relationship is probably only the opening phase of the new faith. Christianity also began with an extreme neglect of definition. It was not at first anything more than a sect of Judaism. It was only after three centuries, amidst the uproar and emotions of the council of Nicaea, when the more enthusiastic Trinitarians stuffed their fingers in their ears in affected horror at the arguments of old Arius, that the cardinal mystery of the Trinity was established as the essential fact of Christianity. Throughout those three centuries, the centuries of its greatest achievements and noblest martyrdoms, Christianity had not defined its God. And even to-day it has to be noted that a large majority of those who possess and repeat the Christian creeds have come into the practice so insensibly from unthinking childhood, that only in the slightest way do they realise the nature of the statements to which they subscribe. They will speak and think of both Christ and God in ways flatly incompatible with the doctrine of the Triune deity upon which, theoretically, the entire fabric of all the churches rests. They will show themselves as frankly Arians as though that damnable heresy had not been washed out of the world forever after centuries of persecution in torrents of blood. But whatever the present state of Christendom in these matters may be, there can be no doubt of the enormous pains taken in the past to give Christian beliefs the exactest, least ambiguous statement possible. Christianity knew itself clearly for what it was in its maturity, whatever the indecisions of its childhood or the confusions of its decay. The renascent religion that one finds now, a thing active and sufficient in many minds, has still scarcely come to self-consciousness. But it is so coming, and this present book is very largely an attempt to state the shape it is assuming and to compare it with the beliefs and imperatives and usages of the various Christian, pseudo-Christian, philosophical, and agnostic cults amidst which it has appeared.