The Bible informs us that "God is love" (1 John 4:16). Love involves a lover, a beloved, and a spirit of love between lover and loved.
The Father might be likened to the Lover; the Son to the One loved, and the Holy Spirit is the Spirit of love. Yet love does not exist unless these three are united as one. This illustration has the advantage of being personal, since it involves love, a characteristic that flows only from persons.
Seeing that God is love (1 Jn. 4:16), the relationship between the Father, Son, and Holy Spirit is a demonstration of perfect love in its purest form. Love is not force. Love is accepted and flows from person to person. There is a lover—one initiating the love, a beloved—the one receiving the love from the lover, and the spirit of love—a mutual received love between both parties. In the case of the triune relationship, this love is mutually given and received by all three members of the Godhead.
Love was/is extended from the intelligent loving unity in heaven to intelligent created beings. Why? To fill the universe with His spirit of love … mutually given and received.
John 17:21
that all of them may be one, Father, just as you are in me and I am in you.
The love of many becoming one with their creator experiencing everything created by Him through LOVE. Beautiful!