More than most early modern Christian thinkers, Edwards delineated distinct roles for each of the three divine Persons. The Father is “the fountain,” “the Deity without distinction.” He is the great “author” of the plan of redemption who provided a redeemer or purchaser. Although the Father and the Son are equal in divine nature, the Father is the “head” of the persons in the Trinity and Christ’s personal head. Christ is subject to him and dependent on him. … His principal role in the history of redemption was to purchase our communion with God, which is the Holy Spirit.
–The Theology of Jonathan Edwards (Oxford, 2012), 194-95.