But the blessing of the close fellowship of the faith goes deeper still. It does not merely out of its abundant fruitfulness, as a shewing of the Spirit and of power, attest the Gospel before the world and communicate its own living faith to the weak members of the Body of Christ. It plays an important part also in the begetting of the faith and in the development of particular truths. We have already shown that the community co- operates in the begetting of supernatural faith, and that in particular it is by living contact with the church fellowship that faith acquires its absolute certainty (cf. p. 58 ff.). Let us speak here only of those delicate influences whereby the fellowship of the faith, in its mysterious co-operative action, brings about the formulization of a truth of the faith, the definition of a dogma.