When petition is grounded in thanksgiving, God and not self-interest becomes the focus. On the other hand, thanksgiving without petition proclaims God to be the Creator without trusting that he indeed is one who is able to provide for his people. In the Pauline epistles, petitions are often found precisely in the thanksgiving paragraphs that introduce the epistles. The two cannot be separated in the Pauline model of prayer.
— Quoted in Kostenberger, Andreas. 1-2 Timothy &. Titus, 96.