United in soul, sharing one mind and purpose. Paul exhorts the Philippians in 2:2 to 'be of the same mind' (literally 'united in soul') as part of making his joy complete. The word goes beyond mere agreement to describe a deep spiritual unity, a harmony of affections and intentions. It's more intimate than intellectual consensus—it's shared emotional life and common purpose. Ancient friendship literature prized this kind of soul-friendship. Paul calls the church to experience this depth of unity through having the mind of Christ.