Unity Can't Be Achieved

The prayer of a righteous man avails much (James 5:16)

may they be one, as we are one (Jesus in John 17:22)

If one is to believe that Jesus is righteous, and that the prayers of a righteous man avails much, and that Jesus prayed that we all be one, then can we believe that his prayer is already answered? Instead of believing that this unity is something that needs to be worked for, is it possible to be certain that it is already a reality that needs admission and maintenance:

make every effort to maintain the unity of the Spirit (Ephesians 4:3)

This is not to be interpreted that unity is something to achieve. Rather, it is a reality to be believed, made manifest, and lived by. Those who draw the lines of division differentiating between people are diametrically opposed to the spirit of Jesus. We are one. There is unity. Let's work from there.