The invitation of the book of Philippians is to be joyful in light of the gospel despite our circumstances. Though we often rate the quality of our lives by our circumstances, God’s kingdom provides us another way when we recognize that God has already provided for what we truly need. Then we can accept our circumstances with joy, because we can do everything through Christ who gives us strength.
I rejoiced in the Lord greatly that now at length you have revived your concern for me. You were indeed concerned for me, but you had no opportunity. Not that I am speaking of being in need, for I have learned in whatever situation I am to be content. I know how to be brought low, and I know how to abound. In any and every circumstance, I have learned the secret of facing plenty and hunger, abundance and need. I can do all things through him who strengthens me.