It is also through the sanctifying and life-giving mysteries of the Holy Church.
"You yourselves," that is, each one separately must build himself up in this common construction, and all must build one another up mutually. Each cares for another, and therefore all care for all.
"A spiritual house": the house is a temple, according to the context, where sacrifices were offered. But this is a spiritual temple, in contrast to a material one.
It is spiritual because it is built from living stones, animated by the Spirit of God, morally perfected in the spirit, and living by the spirit.
As a house or temple composed of many separate stones and made up of different parts forms one whole, so the Christian community must be one whole, though it consists of many individual members.
The thought without the image is this: standing firm on faith in Christ, the Redeemer of the world, be morally perfected, each one individually and each one in relation to all.
Thus all of you, in relation to all, should become as it were a spiritual temple in which God dwells.
"A holy priesthood," which you build from yourselves, means that you should be a holy community of priests.
As God in the Old Testament had His temple and His priests, who served Him in His house, especially by offering sacrifices, so it is also in the New Testament.
Only here the whole community must be both temple and priests. Since this entire discourse of the Apostle is not literal but figurative, it must be understood in a transferred sense.
Thus the expression "holy priesthood" must also be understood in a transferred sense. It does not mean priesthood as a special class of persons appointed in the Church for teaching, performing the mysteries, and governing.
This latter priesthood is not abolished by the universal priesthood. On the contrary, it serves as an image for expressing the thought of the high calling of all Christians.
"To offer spiritual sacrifices": the chief calling of the Old Testament priests was to offer in the temple before God the material sacrifices established by God.
So each Christian separately, and the whole community as one body, must offer spiritual sacrifices to God. For they themselves constitute a spiritual temple, and God is Spirit, to whom service must be rendered in spirit and truth (Jn 4:23-24; cf. note).
What are these spiritual sacrifices? In general, they are the sacrifices of virtue.
Virtue is so difficult for sinful human nature, and must be accompanied by such struggle, that in practicing it a person as though offers a sacrifice to God.
He suppresses sinful passions, or in general the old man with his deeds, for the perfection of the spiritual man.
Thus the holy Apostle Paul beseeches Christians to present their bodies as a living sacrifice to God for rational service (Rom 12:1). This is not only once at some time, but constantly and without interruption (cf. Lk 9:23).
All particular good works, such as prayer, self-denial, works of mercy and love, and so forth, are spiritual sacrifices of the Christian to God (cf. Heb 13:15-16; 1 Jn 3:16; Phil 4:18, and others).
Yet because all such sacrifices, through human weakness, are not always and not fully perfect, they can be pleasing to God only through Jesus Christ.
They are pleasing through His protection, power, intercession, grace, and love for mankind.
The Christian, as a priest, is obliged to offer all these sacrifices both personally and through the order of priesthood established by Christ. This priesthood is a special mediation between Him and those who believe in Him, for their salvation.