REVEREND FATHER, The Holy Father has entrusted me with the pleasant task of conveying his heartfelt gratitude for your remarkable treatise on Mystical Theology, Les Graces d'Oraison, now in its fifth edition. His Holiness is delighted by the fruitful outcome of your extensive studies on grace in souls seeking perfection. He appreciates that directors of consciences now have access to a work of significant value and utility. You skillfully draw upon the established teachings of esteemed masters while presenting them in a manner suited to contemporary needs. Wishing you great success and abundant spiritual fruits, His Holiness extends the Apostolic Benediction. I am pleased to express my deep esteem for you. CARDINAL MERRY DEL VAL. ROME, April 2, 1907. Father Poulain's work exemplifies modern scientific methods applied to mysticism, often dismissed by critics as mere piety. It explores whether there exists a deeper, more intimate connection with God, a secret realm accessible to a select few. This inquiry is particularly relevant in an era fascinated by Occultism and Spiritualism. The book transcends mere spiritual marvels, surveying the Kingdom of Prayer in its various forms. It portrays the interior life as an evolving journey, outlining its laws and stages. Addressing various challenges of the ascetical life, the author's insights, drawn from saints, offer practical guidance. These teachings, often found in unexpected places,
