First Council of Constantinople

After Nicaea, semi-Arian and "Pneumatomachian" (Spirit-fighter) parties still denied that the Holy Spirit was fully God. Basil the Great, Gregory of Nazianzus, and Gregory of Nyssa (the Cappadocian Fathers) answered from Scripture: the Spirit searches the deep things of God (1 Cor 2:10–11); to lie to Him is to lie to God (Acts 5:3–4); He is named alongside Father and Son in the one baptismal name (Matt 28:19). The council expanded the creed's article on the Spirit — "the Lord and Giver of Life, who proceeds from the Father, who with the Father and the Son together is worshiped and glorified" — and reaffirmed the true humanity of Christ against Apollinarianism.

This is the creed most Christians today mean when they say "the Nicene Creed." Constantinople completed the trinitarian confession Nicaea had begun and gave the church a shared summary of biblical truth about Father, Son, and Spirit.

• Acts 5:3-4— Lying to the Spirit is lying to God
• 1 Corinthians 2:10-11— The Spirit searches the deep things of God
• Matthew 28:19— Baptized into the one name of Father, Son, and Spirit

• ·Nicene-Constantinopolitan Creed text
• ·First Council of Constantinople — overview

• council_or_creed

  The Nicene Creed

  Completed the creed

• council_or_creed

  First Council of Nicaea

  Followed Nicaea