By A.B. Simpson The mystery of prayer! There is nothing like it in the natural universe. A higher and a lower being in perfect communion. Marvelous bond of prayer which can span the gulf between the Creator and the creature, the infinite God and the humblest and most illiterate child! How has this been accomplished? The three Divine persons have all co-operated in opening the gates of prayer. The Father waits at the throne of grace as the hearer of prayer; the Son has come to reveal the Father, and has returned to be our Advocate in His presence. And the Holy Spirit has come still nearer, as the other Advocate in the heart, to teach us the heavenly secret of prayer, and send up our petitions in the true spirit to the hands of our heavenly Intercessor.