4 You well understand, Venerable Brethren, that these considerations are confirmed by the ,opinion held by a large number of the Fathers, to which the sacred liturgy gives its sanction, that the Joseph of ancient times, son of the patriarch Jacob, was the type of St. Joseph, and the former by his glory prefigured the greatness of the future guardian of the Holy Family. And in truth, beyond the fact that the same name - a point the significance of which has never been denied - was given to each, you well know the points of likeness that exist between them; namely, that the first Joseph won the favour and especial goodwill of his master, and that through Joseph's administration his household came to prosperity and wealth; that (still more important) he presided over the kingdom with great power, and, in a time when the harvests failed, he provided for all the needs of the Egyptians with so much wisdom that the King decreed to him the title "Saviour of the world." Thus it is that We may prefigure the new in the old patriarch. And as the first caused the prosperity of his master's domestic interests and at the same time rendered great services to the whole kingdom, so the second, destined to be the guardian of the Christian religion, should be regarded as the protector and defender of the Church, which is truly the house of the Lord and the kingdom of God on earth. These are the reasons why men of every rank and country should fly to the trust and guard of the blessed Joseph. Fathers of families find in Joseph the best personification of paternal solicitude and vigilance; spouses a perfect example of love, of peace, and of conjugal fidelity; virgins at the same time find in him the model and protector of virginal integrity. The noble of birth will earn of Joseph how to guard their dignity even in misfortune; the rich will understand, by his lessons, what are the goods most to be desired and won at the price of their labour. As to workmen, artisans, and persons of lesser degree, their recourse to Joseph is a special right, and his example is for their particular imitation. For Joseph, of royal blood, united by marriage to the greatest and holiest of women, reputed the father of the Son of God, passed his life in labour, and won by the toil of the artisan the needful support of his family. It is, then, true that the condition of the lowly has nothing shameful in it, and the work of the labourer is not only not dishonouring, but can, if virtue be joined to it, be singularly ennobled. Joseph, content with his slight possessions, bore the trials consequent on a fortune so slender, with greatness of soul, in imitation of his Son, who having put on the form of a slave, being the Lord of life, subjected himself of his own free-will to the spoliation and loss of everything.
Source: Quamquam Pluries (Vatican.va)