St. Paul's appeal to the local church:

I appeal to you, brothers, in the name of our Lord Jesus Christ, that all of you agree with one another so that there may be no divisions among you and that you may be perfectly united in mind and thought.
1 Corinthians 1:10

The Lord Jesus' prayer for His followers:

"Holy Father, protect them by the power of your name--the name you gave me--so that they may be one as we are one...I in them and you in me. May they be brought to complete unity to let the world know that you sent me and have loved them even as you have loved me."
John 17:11,23

Remember the famous J.O.Y. acronym:

  J - Jesus
  O - Others
  Y - Yourself