Therefore run together as into one temple of God, as to one altar, as to one Jesus Christ, who came forth from one Father, and is with and has gone to one.

Be careful, therefore, to take part only in the one Eucharist; for there is only one Flesh of our Lord Jesus Christ and one cup to unite us with His Blood.

Where the bishop is present, there is the Catholic Church

For some are in the habit of carrying about the name in wicked guile, while they still practice things unworthy of God. You must flee these as you would wild beasts. For they are ravening dogs, who bite secretly, against whom you must be on your guard, since they are men who can scarcely be cured.

It is not that I want merely to be called a Christian, but actually to be one. Yes, if I prove to be one, then I can have the name.

Do everything as if He were dwelling in us. Thus we shall be His temples and He will be within us as our God - as He actually is.

... you... are stones of the temple of the Father, prepared for the Father's building, and drawn up on high by the instrument of Jesus Christ, which is the Cross (cf. Jn. 12:32), making use of the Holy Spirit as a rope, while your faith was the means by which you ascended, and your love the way which led up to God. You, therefore, as well as all your fellow-travelers, are God-bearers, temple-bearers, Christ-bearers, bearers of holiness, adorned in all respects with the commandments of Jesus Christ.