A MAP OF LIFE relation to all other things^ to find the end of the road and the way to it. So much a good map can do. The best map cannot do more. A map is concerned with the surface and cannot tell you in detail of the treasures that lie beneath. On the field here mapped, there is no point at which one may not dig with immeasurable profit : or to abandon the metaphor, every single truth mentioned is but a single name for a whole world of truth. The Blessed Trinity will yield truth for our meditation for all eternity, and even here below we shall not exhaust what here below may be known. Or if, leaving the intricacies of the map we concentrate on any one point of it— the excellence of our Lady, for instance, or the life of prayer — we shall come upon a mine of truth by comparison with which the bare outlines of a map may seem poor colourless things. But even for the appreciation of any one doctrine, the map is necessary. No truth is merely itself: something pours into it from all other truth : and for a study of any one point of revealed truth there is no better equipment than a general view of the whole. 144