"How good and pleasant it is when God's people live together in unity."
How do we achieve unity? First our hearts have to be united with God and his will. If we are not united with God we have no foundation.
How do we achieve unity?
Colossians 3:14 says, "And over all these virtues put on LOVE, which binds them all together in perfect unity. Love binds all virtues...love is the key ingredient in unity. If we love one another we make His joy complete. Phillipians 2:1-2 says, "Therefore if you have any encouragement from being UNITED with Christ, if any comfort from his love, if any common sharing in the Spirit, if any tenderness and compassion then make my joy complete by being like-minded having the same love, being one in spirit and one in mind."
We have to give up our selfishness and react in Love. If everyone would react in humility towards one another and value each other above themselves unbelievers would see Jesus through us. We would be a witness with actions and not by denomination. God gives us clear instructions in his Word to help us succeed and live fulfilling lives but we often can't see past ourselves to follow it. Romans 15:6 says if we are ONE mind and ONE voice then we Glorify GOD!
So love God above all else, be united with his spirit, and unite your actions with his word and we will glorify HIM =)