To have unity we must overcome joylessness, lack of reasonableness, and anxiety. We have to be told to rejoice because we naturally resist it, and because we tend to seek joy in earthly things instead of in (not just from) the Lord. Find happiness by enjoying God throughout the day.
Philippians 4:1 Therefore, my brothers, you whom I love and long for, my joy and crown, that is how you should stand firm in the Lord, dear friends! 2 I plead with Euodia and I plead with Syntyche to agree with each other in the Lord. 3 Yes, and I ask you, loyal yokefellow, help these women who