These verses prophesied of what the Savior would do in and for this world. Though He was perfect, He was baptized to fulfill all righteousness (since it is a requirement for exaltation) and to set an example for us. And He went about teaching (many blog posts about that a few weeks ago). He ministered unto others. He served them. He blessed them. He healed them. And He died for our sins. Every thing He did was because He selflessly and sincerely loved each one of us.
And that is the example for us to follow every day: peace on earth, good will toward men--because that's what the first gift of Christmas brought to us. And we need to continue to give it to others.