The stichera by the Emperor Leo, Come, let us worship the Three-hypostatic Godhead, marks the beginning of the celebration of Pentecost as a feast honoring the Three-hypostatic God—the Holy Trinity.

What the Catechism of the Catholic Church says on "The Trinity:" 232. "Christians are baptized 'in the name of the Father and of the Son and of the Holy Spirit' [Mt 28:19.] Before receiving the ...

The Son is my refuge. The Holy Spirit is my protector. Glory to the holy and undivided Trinity, now and for ever. Let us praise the Father, the Son and the Holy Spirit; let us bless and exault God ...

When a holy day of obligation falls on a Sunday and so is transferred to another day, the Catholic faithful are encouraged to ...