This article, and the four which follow, will be about revelation, about the community God has established, and about the sacraments that constitute it: they are theological, concerned with God and his dealings with men. Most of what I say will probably be pretty familiar stuff to you, but some of it may be new; this is because I shall be drawing on the results of the great theological revival which has been going on for some years in the Church but which has not yet had its full effect in England. A word in passing about this revival, because we will be constantly coming back to it. It is one aspect of a quiet reformation, a surge of new life within the Church. The most obvious signs of this are the liturgical movement, the return to the scriptures and the Fathers and, above all, the new understanding of the place of the laity in the Church.