Book excerpt: In order, then, to attach ourselves to this great means of salvation, we must first of all consider how necessary it is to us, and how powerful it is to obtain for us all the graces that we can desire from God, if we know how to ask for them as we ought. Hence, in the first part, we will speak first of the necessity and power of prayer; and next, of the conditions necessary to make it efficacious with God. Then, in the second part, we will show that the grace of prayer is given to all; and there we will treat of the manner in which grace ordinarily operates. Aeterna Press