Christian people who really want to serve the Lord with willing, servant hearts sometimes neglect their own well-being. Jesus said, "Love your neighbor as yourself"
(Matthew 19:19). And that’s not about being egocentric, but it implies that treating yourself right — respecting that God knows you, made you, has a plan for you (Psalm 139:13-16). Properly caring for yourself, both body and soul, while recognizing that your body is the temple of God becomes the basis for treating others properly(1 Corinthians 6:19-20).
You would take care of your best friend so that he or she could take care of others. You would try to understand that friend, and comfort and strengthen that friend all you could. You need to do the same thing to the person in your mirror, as well! This is not about being selfish, but about being respectful of God's purposes for you!
That means taking care of yourself!
Christian writer Fredrick Buechner put it this way, "A bleeding heart is no help to anybody if it bleeds to death." That means not only taking care of yourself physically, but feeding yourself with divine nourishment from God's Word, being merciful to yourself, accepting the bread of life from Jesus, and accepting God's forgiveness. When we do these things, we are then able to share them with others more completely.