Saying that God exists as three persons but is one God means that God the Son and God the Holy Spirit have exactly the same nature or being as God the Father in every way. Whatever attributes and power God the Father has, God the Son and God the Holy Spirit have as well. "Thus, God the Son and God the Holy Spirit are also eternal, omnipresent, omnipotent, infinitely wise, infinitely holy, infinitely loving, omniscient."