Keil & Delitzsch

All prayer will be heard then. "And it will come to pass: before they call, I will answer; they are still speaking, and I already hear." The will of the church of the new Jerusalem will be so perfectly the will of Jehovah also, that He will hear the slightest emotion of prayer in the heart, the half-uttered prayer, and will at once fulfill it (cf., Isa 30:19).