While the basic and traditional lines of the spiritual life are unalterable, being the fruit of the thought of theologians and the experience of souls, there is room for development in method and indeed, granted changing circumstances, the possibility of completely new methods. Of course the dictum Nil innovetur nisi traditum est is as true here as elsewhere, and new methods can never mean more than a new approach or a new combination of traditional methods. This present age is one in which circumstances would seem to demand such a new approach. It is an age which has seen the growth and development of a deeper appreciation of the place of the laity in the missionary activity of the Church.