Look at Philippians 2:4- “Let each of you look not only to his own interests, but also to the interests of others.”
The word interests is a filler. In the original, it’s open-ended. All that is specified is “your own (something)” or “the other’s (something).” So it could be, “Let each of you look not only to your own financial affairs, or your own property, or your own family, or your own health, or your own reputation, or your own education, or your own success, or your own happiness—don’t just think about that, don’t just have desires about that, don’t just strategize about that, don’t just work toward that; but look to the financial affairs and property and family and health, and reputation, and education, and success, and happiness of others.”
In other words, verse 4 is a way of saying the words of Jesus, “Love your neighbor as you love yourself” (Matthew 22:39). That is, make the good of others the focus of your interest and strategy and work. Find your joy in making others joyful. If you are watching television and your child says, Would you play with me? don’t just think about how tired you are. By an act of gospel-fashioned, Christ-exalting will, put the child’s interests before the pleasures of your relaxation.