Blessing someone seems to be a way to transform anger and irritation into love and joy, and sometimes, even miracles.
Found another little interesting article on it.
The Power of Spoken Blessings - by Bill Gothard
Throughout Scripture, the importance of verbal blessings is expressed. In four New Testament books, God gives us direct instruction to bless those who curse and revile us. Obeying this instruction produces results that are not expected by the one who gave the curse or the one who was cursed.
A verbal blessing is made up of three powerful forces: our words, God’s Word, and God’s name. The power of our words alone is affirmed by the Scripture that states, “Death and life are in the power of the tongue” (Proverbs 18:21).
With verbal blessings, the tongue has an even greater potential for good, because a blessing can overcome a curse just as light is stronger than darkness.
Speaking a verbal blessing can even help parents during times of child discipline. By blessing the child, the parents will be greatly helped in overcoming any anger or frustration, and will instead have a spirit of patience and love. The blessing should emphasize God’s love for the child and His great purposes for him or her.
To read more, check out: The Power of Spoken Blessings