In the intellectual training of young seminarians — although other studies especially those relating to social questions, so necessary today, should not be overlooked — the greatest importance must be given to philosophical and theological teaching “according to the method of the Angelic Doctor”76Cf. C.I.C., can 1366, 2. brought up to date and adapted to meet modern errors. Study of these subjects is of maximum importance and usefulness both for the priest himself and for the people. The masters of the spiritual life state that the study of the sacred sciences, provided they be imparted in the right way and according to correct systems, is a most efficacious help in preserving and nourishing the spirit of faith, checking the passions, and maintaining the soul united to God. It must be added that the priest who is the “salt of the earth” and “the light of the world”77Cf. Matth., V, 13, 14. must labor mightily for the defense of the Faith by preaching the Gospel and confuting the doctrinal errors opposed to it which are disseminated today among the people by every possible means. But these errors cannot be efficaciously fought if the unassailable principles of Catholic philosophy and theology are not thoroughly known.