This is a wonderful summary of the Trinitarian work of salvation by the great puritan John Owen:
When God designed the great and glorious work of recovering fallen man and the saving of sinners, to the praise of the glory of his grace, he appointed, in his infinite wisdom, two great means thereof. The one was the giving of his Son for them, and the other was the giving of his Spirit unto them. And hereby was way made for the manifestation of the glory of the whole blessed Trinity; which is the utmost end of all the works of God. Hereby were the love, grace, and wisdom of the Father in the design and projection of the whole; the love, grace, and condenscension of the Son in the execution, purchase, and procurement of grace and salvation for sinners; with the love, grace, and power of the Holy Spirit in the effectual application of all unto the souls of men, made gloriously conspicuous.
—John Owen
Quoted in A Golden Treasury of Puritan Devotion, edited by Mariano Di Gangi
I love the phrase “to the praise of the glory of his grace” because it reminds me very much of the words of the Apostle Paul in one of my favorite passages of scripture:
Blessed be the God and Father of our Lord Jesus Christ, who has blessed us in Christ with every spiritual blessing in the heavenly places, even as he chose us in him before the foundation of the world, that we should be holy and blameless before him. In love he predestined us for adoption as sons through Jesus Christ, according to the purpose of his will, to the praise of his glorious grace, with which he has blessed us in the Beloved. In him we have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace, which he lavished upon us, in all wisdom and insight making known to us the mystery of his will, according to his purpose, which he set forth in Christ as a plan for the fullness of time, to unite all things in him, things in heaven and things on earth.
In him we have obtained an inheritance, having been predestined according to the purpose of him who works all things according to the counsel of his will, so that we who were the first to hope in Christ might be to the praise of his glory. In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit, who is the guarantee of our inheritance until we acquire possession of it, to the praise of his glory. (Ephesians 1:3-14, ESV)