The Holy Spirit
These are the three hypostases of The Trinity. They are of one essence and undivided. The Father is God, The Son is God, The Holy Spirit is God.
God is manifested in creation through The Holy Spirit and The Son.
The Son is The Word of God. The Holy Spirit is like the breath that carries that word. The Word of God is Truth. All of creation was created by and through The Word, as nothing can exist unless Truth is in it.
The hypostasis or person of The Son is the unity of two natures. Fully man and fully divine. This is the unifying of all creation with divine.
The incarnation is God becoming man. By God becoming creation, all of the universe is deified with him. Becoming death, God descends to the lowest hades and rises back up, filling all things, drawing all of creation back to Him.
And so God is with us. God did not speak creation into being and then back off. All of creation is filled by God, enlivened by The Holy Spirit and united in the fleshly nature of the second hypostasis.
And being united with God, all of creation, though dying, is saved and given eternal life in Christ Jesus. Through His resurrection, Christ has conquered death by death, bestowing life to those in the tombs.
Jesus Christ is the persistent reality, The eternal Word of God. And through His incarnation, He is The Most Perfect Image of God The Father as revealed by the life giving and consubstantial Holy Spirit.
It is God's presence in creation that gives it its existence. God is with us.
To know The One True God, The Ultimate Reality, and The One He sent, Jesus Christ. This is to know eternal life.