Seeking the Will of God in all things, such was St. John Eudes' sole ambition, his wondrous response to the discovery of the mystery of God's love lived in communion of mind and heart with Jesus and Mary. This is clearly evident in his immense correspondence. Father Clément Guillon, Eudist Superior General at the time (now Bishop of Quimper and Leon, in France), chose 50 letters of which he presents the most significant excerpts. Each one constitutes a chapter which opens with a synopsis of the events which preceded the letter and led to its being written. Then, follows a brief presentation highlighting the letter's main points, and finally the text of St. John Eudes' letter itself. Abundant footnotes shed a great deal of light on pertinent circumstances and people.