Aphrahat the Persian Sage

Purity of heart constitutes prayer more than do all the prayers that are uttered out loud, and silence united to a mind that is sincere is better than a loud voice of someone crying out. My beloved, give me now your heart and your thought, and hear about the power of pure prayer; see how our righteous ancestors excelled in their prayer before God and how it served them as a “pure offering.” For it was through prayer that offerings were accepted, and it was prayer again that averted the flood from Noah. Prayer has healed barrenness, prayer has overthrown armies, prayer has revealed mysteries, prayer has divided the sea, prayer made a passage through the Jordan. It held back the sun, it made the moon stand still, it destroyed the unclean, it caused fire to descend. Prayer closed up the heaven, prayer raised up from the pit, rescued from the fire and saved from the sea.