"[G]entleness is essential to Christian living. It is not an add-on. It is… one of the few indisputable evidences of the Holy Spirit alive and well within someone. Gentleness is not just for some Christians, those wired in a certain way. It cannot merely be an inherent character trait, a result of personality or genetic predisposition, because it is listed as part of the fruit of the Spirit in Galatians 5. Looked at another way, nowhere in the New Testament's lists of spiritual gifts is gentleness identified as one such gift. It is not a gift of the Spirit for a few. It is the fruit of the Spirit for all. To be gentle is to become who we were meant to be; that is, to return to who we once were, in Eden."
—Dane C. Ortlund, Edwards on the Christian Life: Alive to the Beauty of God (Crossway), 91.