“For the divine nature may be communicated or imparted in some sense; and indeed while it is essentially and necessarily singular, it is certainly plural in its personal manifestations. Hence we have the Father, Son, and Holy Spirit equally divine, though personally distinct from each other. We have in fact, but one God, one Lord, one Holy Spirit; yet these are equally possessed of one and of the same divine nature. Some conceive of God as mathematical unit; and as a thing cannot be both mathematically singular and plural, one and three, at the same time and in the same sense, they deny the true and proper divinity of the Son of God and of the Spirit of God. But it would seem to us, that they reason not in harmony with the sacred style of inspiration. But why should we imagine that there cannot be a plurality of personal manifestations in the divine nature any more than in the angelic or human, especially as man was created in the image of God?” — Alexander Campbell, The Christian System, p. 8.