Praying with thanksgiving produces an inward peace created by God through the Holy Spirit. Peace is the calm assurance that what God is doing is best. The word “guard” means to act as a sentry, to garrison. The peace of Christ guards us from turmoil, worry, distress and fear. This peace cannot be produced or manufactured by any effort on our part. There is no counselor or therapy that can produce this. It is incomprehensible to us. Thankful prayer brings unfathomable peace.