A totally self-sufficient community of love and glory

Shortly I will be posting a book review for the book written by Mike Cosper called Rhythms of Grace: How the Church's Worship Tells the Story of the Gospel. For now, consider this excerpt from the book which discusses the existence of worship in eternity-past before the creation of the universe:

So before the world began, there was love. It flowed-perfect, complete, and constant-between the three persons of the Trinity. This love was an unending appreciation, a perpetual beholding and rejoicing in the goodness and perfection of the Father, Son, and Holy Spirit. The scene was what theologian Fred Sanders calls the "happy land of the Trinity." It was, and is, a totally self-sufficient community of love and glory. 

At its heart, worship is rooted in this love. The Trinitarian community is, in a sense, perpetually beholding one another with love and amazement . . . The word worship comes from the Old English weorthscipe, which combines two words meaning "ascribe worth." The Trinity can be said to be always at worship because the three persons of the Godhead perfectly behold the worth and wonder of one another. (26-7)