There is one God and in this one God there are three Divine Persons; the Father, the Son and the Holy Spirit. The Father is the first Divine Person; the Son is the second Divine Person, and the Holy Spirit is the third Divine Person.
All three Persons contributed to and shared in the work of redemption. The Father sent His Son to earth, for "God so loved the world as to give His only-begotten Son." The Father called us to the faith.
The Son, our Savior Jesus Christ, became man and died for us. He redeemed us and made us children of God.
After Christ's ascension the Holy Spirit became our Teacher, our Leader, our Guide, our Consoler.
The feast of the Most Holy Trinity which falls on the first Sunday after Pentecost, should make us mindful that actually every Sunday is devoted to the honor of the Most Holy Trinity, that every Sunday is sanctified and consecrated to the triune God. Sunday after Sunday we should recall in a spirit of gratitude the gifts which the Blessed Trinity is bestowing upon us. The Father created and predestined us; on the first day of the week He began the work of creation. The Son redeemed us; Sunday is the "Day of the Lord," the day of His resurrection. The Holy Spirit sanctified us, made us His temple; on Sunday the Holy Spirit descended upon the infant Church. Sunday, therefore, is the day of the Most Holy Trinity.
Lord, I believe, help my weak faith.