What is the relationship between doctrine and practice in rejoicing?

In the epistles, Paul often presents doctrine before application, illustrating that understanding of who God is and what He has done shapes our responses in life. The joy of the believer is deeply intertwined with sound doctrine, as knowing God’s character, His promises, and the salvation provided through Christ creates a foundation for genuine rejoicing. Therefore, our practice of rejoicing stems from the doctrinal truths we believe, illustrating that adherence to correct theology naturally leads to a life characterized by joy and thanksgiving in all circumstances. As noted in Philippians 4:1, standing firm in the Lord propels one to rejoice consistently.