“Finally, all of you, be like-minded, be sympathetic, love one another, be compassionate and humble.” 1 Peter 3:8
“Like-minded” means have from a common faith in Christ.
“Be sympathetic” is to have compassion for others.
“Be compassionate and humble” is to not exalt oneself in pride but consider others as Christ did.
Luther said, “Here you see what true brothers are. They cling together much more closely than any friends do. We Christians should also do this, for we are all brothers through Baptism. After Baptism even my father and my mother are my brother and my sister, for through faith I have the very same blessing and inheritance from Christ that they have”.