ABSTRACT
This chapter emphasizes the claim that there is but one God. The nature of this one God is then elaborated upon in this, and the corollary of this, its significance for humanity, is expounded by Irenaeus. This God has been demonstrated, 'shown forth', or 'shown to be'. It is to be noted that Irenaeus does not begin with an understanding of the Spirit gleaned from his presence with creation, but immediately appeals to the very existence of God himself 'God is Spirit, and by the Spirit He adorns all things'. Irenaeus is the first theologian to bring into focus the work and Being of the Spirit in creation. With regard to the internal relations of the Triune God, we find Irenaeus saying of the Father that: 'His offspring and His similitude do minister to Him in every respect: that is, the Son and the Holy Spirit, the Word and Wisdom'.
