While classical theists in the tradition of Augustine and Thomas Aquinas argue that God is good because He is simple, relational theists argue that since God is good, He cannot be simple. For the relational theists, goodness necessitates an ability of God to respond, react, or change in some way to His creatures changing needs. Conversely, Augustine and Aquinas argue that for God to truly be good, He must be good, not merely possess it. Thus, they ground God’s goodness in Divine Simplicity. DSS ensures that God’s goodness is necessary, unchanging, and not dependent on anything external. The charge against DSS by relational theists is generally three-fold: it is unbiblical, incoherent, and inconsistent. This paper seeks to demonstrate that DSS is not only coherent, consistent, and biblical but essential for God to be good. To demonstrate it is coherent and consistent, it seeks to clarify the meaning of “simplicity” and “accidents,” as used by Aquinas, as his critics appear to be working with different definitions. Finally, the paper illustrates that DSS is biblical by examining the Epistle of James. James 1:5, 13, 17–18 emphasizes God’s unchanging goodness and simple goodness, thus grounding His goodness in DSS. While simplicity is not as explicit in James as immutability, its presence is pervasive. In fact, it is so central to James that David Gibson sees it as responsible for James’s “governing and unifying theme” of wholeness. James not only states that the unchanging God gives good gifts (1:17) but that He “simply” (haplos) gives. Hence, believers can consistently rejoice and trust God despite circumstances because God’s goodness is not contingent on something He possesses but because He is goodness.