This truly theosophical book strictly insists on observing the sanctity of Sunday and the duty of fasting on Wednesday and Friday. And with simple but clear and categorical words, it shows us that behind the apparent form lies the depth of the essence of the Christian faith, as without sacrificial love, virtues that truly make a Christian's life true are not acquired.

The basic principle of our Church says: "Action is the foundation of theory". That is to say, from observing the forms, we are led to the essence. In spiritual "theory", we can only ascend through the observance of the forms. Only after strict observance of the forms.

The holy Epistle is a very small book, but rich in great teachings. And it has a special grace, as it is addressed to the few brothers of Jesus.

It gives, in very simple but also very powerful words, in the language and vocabulary of the common man, the essence of faith. It speaks of salvation and redemption through Jesus Christ; of the providence and omnipotence of Christ; of judgment; of retribution; of the responsibility of parents and priests and every believer. It fulfills the Evangelical (even with a touch): "Compel them to come in" (Luke 14:23)!!! It makes the reader deeply love Christ; it pushes him towards an apostolic type of spiritual union with Christ; it makes the person of Christ the center of our life. What could be more essential than this?