Paul begins by encouraging the Philippians to stand firm, not waver in their faith.  He also exhorts two women who are bickering to make up. This passage is applicable to all of us as we tend to worry and fret---God gives us a very practical prescription for the problem of worry and anxiety. Verses 8-9 I think of as a filter---that whatever consumes our mind, whatever worry and anxiety we have, we run them through the filter of God's amazing faithfulness and goodness. For Study one way to go through this passage is to make a list of all of the commands and a list of the promises given.