NET
15 For all these things are for your sake, so that the grace that is including more and more people may cause thanksgiving to increase to the glory of God.
Darby
15 For all things [are] for your sakes, that the grace abounding through the many may cause thanksgiving to abound to the glory of God.
KJV
15 For all things [are] for your sakes, that the abundant grace might through the thanksgiving of many redound to the glory of God.