KNOWLEDGE of the theory and practice of the spiritual life is essential to solid virtue. Without it the soul drifts on a sea of doubt and uncertainty, and wastes time, grace, and opportunity of merit and spiritual progress. With this knowledge an ordinary good will suffices to appreciate how sweet is the Saviour's yoke and how light His burden. Like the ladder which the patriarch Jacob saw reaching from earth to heaven the service of God becomes attractive in proportion to our knowledge and application of the teaching of holy faith. A favorable sign of Catholic life in our day is the desire...