Are you cheerful because you belong to Christ? Does his love comfort you? Is the Holy Spirit your companion? Has Christ been gentle and loving toward you?
References for Philippians 2:1
Then make my joy complete by agreeing with each other. Have the same love. Be one in spirit and purpose.
Don't do anything only to get ahead. Don't do it because you are proud. Instead, be free of pride. Think of others as better than yourselves.
None of you should look out just for your own good. You should also look out for the good of others.