Chapter XXXVIII. There is now, I think, wanting in these remarks no answer to inquiries concerning the Gospel mystery, except that on Faith 2043 ; which we give briefly in the present treatise. For those who require a more elaborate account we have already published it in other works of ours, in which we have explained the subject with all the earnestness and accuracy in our power. In those treatises we have both fought 2044 controversially with our opponents, and also have taken private consultation with ourselves as to the questions which have been brought against us. But in the present discussion we have thought it as well only to say just so much on the subject of faith as is involved in the language of the Gospel, namely, that one who is begotten by the spiritual regeneration may know who it is that begets him, and what sort of creature he becomes. For it is only this form of generation which has in it the power to become what it chooses to be. 2043     Faith. Cf. Church Catechism; “Faith whereby they steadfastly believe the promises of God made to them in that Sacrament (of Baptism).” 2044     συνεπλάκημεν , i.e. against Eunomius, in defence of the equality of the Trinity in the Baptismal symbol. Often as Gregory in that treatise opposes Eunomius for placing the essence of Christianity in mere γνῶσις and δογμάτων ἀκρίβεια , as against God’s incomprehensibility, and knowledge only by the heart, he had yet spent his whole life in showing the supreme importance of accuracy in the formulas upon which the Faith rested. This helps to give a date for the Great Catechism.