Philip Yancey says that Jean Nicoloas Grou was "a mystic from the eighteenth century, [who] prescribed that healthy prayer should be humble, reverent, loving, confident, and persevering — in other words, the exact opposite of impatient." The following appears in the Manual for Interior Souls, published in 1890 by the S. Anselm's Society, London. Our readers will perhaps not be displeased if we give here a short account of the author of this excellent work, extracted from a longer notice which appeared in " L'Ami de la Religion."