For the origin of liturgy thus broadly defined we have to go a long way back; beyond the Prayer Book, beyond the Mass-book, beyond the ancient Sacramentaries, yes, beyond the synagogue worship, beyond the temple worship, beyond the tabernacle worship; in fact I am disposed to think that, logically, we should be unable to stop short until we had reached the very heart of man itself, that dimly discerned groundwork we call human nature, and had discovered there those two instincts, the one of worship and the other of gregariousness, from whence all forms of common prayer have sprung. Where three or two assemble for the purposes of supplication, some form must necessarily be accepted if they are to pray in unison. When the disciples came to Jesus begging him that he would teach them how to pray, he gave them, not twelve several forms, though doubtless James's special needs differed from John's and Simon's from Jude's, he gave them, not twelve, but one. "When ye pray," was his answer, "say Our Father." That was he beginning of Christian Common Prayer. Because we are men we worship, because we are fellow-men our worship must have form.