Here is a quote from Professor Thomas F. Torrance on the meaning of the Trinity. Every word and phrase merits careful reflection.
The Trinity “means that God is not some remote, unknowable Deity, a prisoner in his aloofness or shut up in his solitariness, but on the contrary, the God who will not be without us whom he has created for fellowship with himself, the God who is free to go outside of himself, to share in the life of his creatures and enable them to share in his own eternal Life and Love. It means that God is not limited by our feeble capacities or incapacities, but that in his grace and outgoing love he freely and joyously condescends to enter into fellowship with us, to communicate himself to us, and to be received and be known by us. Moreover, the doctrine of the Holy Trinity means that God does not surrender his transcendence in condescending to be one with us in Jesus Christ, but it does mean that the more we are allowed to know God in himself in this way the more wonderful we know him to be, a God who infinitely exceeds all our thoughts and words about him, but who in spite of that reveals himself tenderly and intimately to us through his Son and his Spirit.” —Thomas F. Torrance