Hamilton on Phiippians 1:27-30

From God's Glory in Salvation through Judgment by Jim Hamilton:

Paul wants the Philippians to strive for the gospel (1:27b) by adopting his perspective and doing what he is doing. If they will embrace this cruciform pattern, they will agree that "to live is Christ" (1:21a), and they will suffer for Christ (1:29b) and join Paul in the self-sacrificing  struggle for the souls of others (1:30). They will also agree that death is gain (1:21b), which will make them fearless before their opponents (1:28a). Living this way on the basis of the glory of God in the salvation through judgment he accomplished by Christ's death on the cross will enact salvation through judgment in their own experience: the Philippian Christians will become living demonstrations that God will destroy the wicked and save his people (1:28b). The life worthy of the gospel is based on and lives out God's glory in salvation through judgment. (486)