Dearly Beloved, Grace and Peace to you.
God is Love. Love is not an object but an action, a process. God is love and the loving of love, and the receiving of love. God is an unfolding relationship. So God is one, and yet must also be more than one. God is a loving parent and a begotten child and the love that proceeds from them, all three. God is community. God is a family.
The Holy Trinity live in loving attentiveness to each other but it is not a closed circle. They open out to us. You are invited to come to the table, to share in that love, to be part of God's nature, God's being, God's loving. This is what it means to be part of the Body of Christ.
All people are our sisters and brothers, all living beings, all Creation: though we are many there is only One of us. Join the communion of the One Who Is Many. Come into the tender love of the Mother who births us, the Lover who desires us, and the love begotten in us. Find your being in the Holy One in whom we are One.
You are the fourth person of the Holy Trinity. Come.