"Flip for joy in Philippians!" That's one way you might remember the theme of Philippians.
Take ten or fifteen minutes to read through this brief book and take note of what Paul has to say about what brings him joy and rejoicing.
For reflection:
What's the relationship between joy and the actions of others?
What part does God play?
How can envy bring about joy?
If you can, compare Philippians 3:1 in several versions. You may see the words safe, safeguard, safety, sure, or necessary. How does this instruction bring safety?