Indispensable to a technical knowledge of the workings of God in the soul is a scientific grasp of human nature. In an admirably clear and concise form such an exposition of psychology has been provided for us by Father Gardeil . . .Writing his book around a judicious selection of texts from all the works of St. Thomas, and following the order of the De Anima of Aristotle, Father Gardeil supplies us with a volume which fits as easily into the hands of the natural scientist as into the hands of the theologian. --Cross and Crown Briefly, this volume is an excellent contribution to a modern field of intellectual thought which direly needs the illumination and guidance of the Doctor Communis . . . Beyond a doubt, this volume is a 'must' for all Catholic philosophy teachers. --Dominicana.