God is no philosophic concept — Martyn Lloyd-Jones

"My dear friends, God is no philosophic concept! God is a person and, as a person, God is, and God loves, and the essence of the life of the blessed Trinity is the love of the Father to the Son and the Spirit, and the love of the Son to the Father and the Spirit, and the love of the Spirit to the Father and the Son. We cannot conceive of that perfect unity, that perfect bliss, that absolute love, and yet it is all found in salvation. ‘God so loved the world that he gave …’ (John 3:16)—yes, and I put it negatively, too, as Paul puts it in writing to the Romans: ‘He that spared not his own Son’ (Romans 8:32). It is there, you see, the love of God, in that he sent the Son of his love, the only begotten Son, into this cruel, sinful world; allowed him to live life in that way as a man, and allowed him to suffer ‘such contradiction of sinners against himself’ (Hebrews 12:3). And he placed your sins and mine upon him on the cross in such a way that at that moment Father and Son were separated, and the Son cried out, ‘My God, my God, why hast thou forsaken me?’ (Matthew 27:46) When I believe that that is possible within the Father-heart of God, then I cannot believe the doctrine of the impassivity of God. I say that God in his love suffered in his Son, and it is there I see the marvellous love of God displayed. And this great gospel manifests, too, the glory of God in revealing his character in this way."

— Martyn Lloyd-Jones (2000). The assurance of our salvation: Exploring the depth of Jesus' prayer for His own: Studies in John 17 (51). Wheaton, IL: Crossway Books.