Colossians 3:17: All of Life Under Christ's Name
Colossians 3:17 refuses to split life into sacred and secular zones: speech and action alike belong to Christ and are answerable to him. Thanksgiving keeps that obedience from turning into self-congratulation.
1 Corinthians 10:31: Do All to the Glory of God
Paul draws a settled conclusion from a long argument about food offered to idols: God's glory, not personal liberty, governs everything a believer does. The verses that follow show that aim working out in ordinary decisions and in care for others.