Chapter 33 — Part IV: Prayer — On Prayer in General
Section 81. Finally, the Holy Ghost is the author of our prayers; and under His guiding influence, we cannot fail to be heard. We have received the spirit of adoption of sons, whereby we cry, "Abba, (Father)." This spirit succours our infirmity and enlightens our ignorance in the discharge of the duty of prayer; nay, even, as the Apostle says, He asketh for us with unspeakable groanings.