In order for us to say that God is love, we must be able to deny, in the same breath, that God is solitary, or alone, or isolated. To be love itself, God must contain within Himself the subject and the object and the verb. He must be the Lover, and He must be the Beloved, and He must be the Love itself. And this is exactly what is revealed to us. The Father loves the Son, His beloved Son. The Son returns that love, doing nothing but what He sees His Father doing. That mutual love, given and wholly received, and wholly received and given back, is itself an infinite person. How could the mutual love between two infinite persons be anything less? That love is the Spirit of God, and is also the Spirit of Christ, and is Holy Spirit of love.