“It is not possible to over-estimate the value of prayer. For more than thirty-five years I have had much intercourse with dying saints and sinners of various ages and conditions. In all that time I have not heard one express regret that he had spent too much time in prayer; I have heard many mourn that they had so seldom visited the throne of grace.” — William S. Plumer, “Prayer Shown to be Efficacious” in Samuel I. Prime, The Power of Prayer: The New York Revival of 1858 (1859)