who possesses it is unbounded as to place, as to time, and as to quality. He is omni-present, eternal, and complete or comprehensive. To say that there are two infinites is to attempt to bound the boundless, to limit the limitless. Two infinites cannot exist together, for each would limit the other, and hence neither would be infinite.
God must be one because He is everywhere-present, always-existing, all-loving, all-wise, all-knowing, all-powerful, uncreated, absolute, complete, unconditioned, infinite, hence indivisible. The moment He ceases to be any of these things He ceases to be God, and hence becomes a finite being.
The Athanasian creed says:
There is one person of the Father, another of the Son, and another of the Holy Spirit. The Father is uncreate, infinite, eternal, omnipotent, God, Lord; so likewise is the Son, and so likewise is the Holy Spirit.
Also, the Father was made and created of none, the Son was born of the Father, and the Holy Spirit proceeds from both. Thus there is one Father, one Son, and one Holy Spirit, and in this Trinity all the three persons are together eternal, and are altogether equal.
