CCC 291
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"In the beginning was the Word. . . and the Word was God. . . all things were made through him, and without him was not anything made that was made." Jn 1:1-3. The New Testament reveals that God created everything by the eternal Word, his beloved Son. In him "all things were created, in heaven and on earth.. . all things were created through him and for him. He is before all things, and in him all things hold together." Col 1:16-17. The Church's faith likewise confesses the creative action of the Holy Spirit, the "giver of life", "the Creator Spirit" (Veni, Creator Spiritus), the "source of every good". Cf. Nicene Creed: DS — Denzinger–Schönmetzer (Enchiridion Symbolorum); Hymn Veni, Creator Spiritus; Byzantine Troparion of Pentecost Vespers, "O heavenly King, Consoler".
Read the full chapter 1. I Believe in God the Father ¶198–421