Because God is the one who begins and completes salvation, good works are a necessary consequence of his work in us.
I. A Necessary Consequence
A. Not Necessary to Save (a Condition) (Romans 3:28; Galatians 5:3)
B. Necessary if Saved (a Consequence) (Philippians 1:6; Romans 8:29-30)
II. Also Necessary for….
A. Assurance of Salvation (Luke 6:43-45; cf. James 2:14-26)
B. A Faithful Testimony (John 13:35; Matthew 5:16)