A hopeful theme of intertwining the science of God with the science of salvation as inseparable, mars this singular contribution on the development of a theology of the spiritual life. Father Durrwell, author of the distinguished The Resurrection (Sheed & Ward 1960), continues in new dimensions to explore the mystery of salvation which is ""centered in the Redeemer, the Son of God, through his death and resurrection"". Modestly the author suggests that these are but ""notes"" about the spiritual life. These ""notes"", however, are put together to form a unity around the center of Christ, the Redeemer. The principles of Christian life are stated fully and clearly with a recurring message of seeing in them the true name for the ""fear of the Lord"", namely hope. The justice of God is seen as man's holiness; the Scriptures, as a kind of Sacrament linking us with the word of salvation in the redeeming Christ; the Mass as a means of sharing in Christ's redeeming act; the Sa-Craments and their role; the Virtues, and finally the study of Mary as the personification of the Christ-life lived perfectly. Father Durrwell has indeed provided the faithful with a guide-book for seeing and applying the Divine plan for men's calvation to their personal lives.