Lord, That I May See: The Faith of the Catholic, authored by N. G. M. van Doornik, is a book that serves as a practical guide or handbook to the Catholic faith. The title itself is a prayerful plea for deeper understanding and insight into the core tenets of Catholicism. The book's purpose is to help readers not just accept the faith blindly, but to understand its rationale and depth, thereby strengthening their belief and providing guidance for spiritual growth.