Sadly, many find the doctrine of the Trinity far too metaphysical and impractical. Some think the ins and outs of who God is don’t really matter that much. What’s really important, they may say, is what God has done! In fact, some may even find the reality of a Triune God peripheral to the gospel itself–the Trinity being a seemingly secondary matter.
God does not give us grace because he needed to or grace would no longer be grace and even more importantly–God would no longer be God.
John and Charles Wesley’s mom, Susanna, did not. Her thoughts on the Trinity show how gratuitous grace flows from the reality of the mind-boggling self-sufficiency of the three-in-one Father, Son, and Holy Spirit:
He is the great God, ‘the God of the spirits of all flesh,’ ‘the high and lofty One that inhabiteth eternity,’ and created not angels and men because he wanted them, for he is being itself, and as such must necessarily be infinitely happy in the glorious perfections of his nature from everlasting to everlasting; and as he did not create, so neither did he redeem because he needed us; but he loved us because he loved us, he would have mercy because he would have mercy, he would show compassion because he would show compassion. (Quoted in The Deep Things of God, Kindle Edition)
God does not give us grace because he needed to or grace would no longer be grace and even more importantly–God would no longer be God. God by his very nature is utterly free to do whatever he wants without compulsion from any outside source whatsoever. And the gospel–good news–of the Triune God is: He graces because he graces. He loves because he loves. He mercies because he mercies. He does what he does because of who He is.
There is no greater news, and there is no other God.