Yes, I mean the Body of Christ...all those who have the Spirit of God in them, scattered throughout the globe in all kinds of churches.
Passages like Romans 14:1-3, and Ephesians 4:11-13 show us that as children of God we are all at different stages of growth in understanding. Some are weak and immature and bound to things they don't have to be bound to. While others are strong and mature and understand Christian liberty. This difference, or 'division', if that's what you want to call it, is just a fact. So there's no way that Jesus was somehow speaking of all of us true believers being unified on the outside. The scriptures are clear, that just isn't possible by reason of our different stages of growth (and the Bible tells us how to endure it). What we are without doubt unified in is how we have been gathered into one unified body by virtue of the Holy Spirit who has gathered all of God's people into that one body, the body of Christ where there is no difference or division between us.