God's messengers are a blessing to others when they are sharing God's messages with them.  As Christians, we are God's ambassadors, bringing God's message of salvation -- the good news -- to others.  We are speaking on behalf of God 24/7 -- everything we think, do and say.  What is your message saying?  Is it a message of peace and good news?  Or are you delivering a message of self-centeredness, jealousy and strife?  When I read this verse in Isaiah I immediately think of Ephesians 6:15, "And your feet shod with the preparation of the gospel of peace."  We use our feet to travel, to deliver.  Are you going out, or are you sitting down on the job?  As Christians, we have a holy occupation -- that wherever we are, whatever we are doing, we are to be about our Father's business, bringing Him glory in whatsoever we do.  Are you fulfilling your holy priesthood?