Mosiah 18

21 And he commanded them that there should be no contention one with another, but that they should look forward with one eye, having one faith and one baptism, having their hearts knit together in unity and in love one towards another.

"The Holy Ghost is a sanctifier. We can have Him as our companion because the Lord restored the Melchizedek Priesthood through the Prophet Joseph Smith. The keys of that priesthood are on the earth today. By its power we can make covenants which allow us to have the Holy Ghost with us constantly.

"Where people have this Spirit with them, we may expect harmony. The Spirit puts the testimony of truth in our hearts, which unifies those who share that testimony. The Spirit of God never generates contention (see 3 Nephi 11:29). This Spirit never generates the feelings of distinction between people which lead to strife. Heeding the Holy Ghost leads to personal peace and a feeling of union with others. It unifies souls. A unified family, a unified Church, and a world at peace depend on unified souls." (Henry B. Eyring, “Be One,” Ensign, Sep 2008, 4–9)

One other blessing that comes to us when we have the Spirit of the Holy Ghost with us, is that we cannot be offended. We forgive others and can let go of anger and the spirit of vengeance. I have met more than one person who has let anger and bitterness overcome them and keep them from the blessings of church activity and has even led them to commit sin, justifying their actions by the actions of others.