“Albert Schweitzer, the German medical missionary, described at his hospital in the African jungle. He did not hire idealists for that hospital, nor did he hire people who had a righteous sense of how much they were giving to the world. He certainly did not hire people who set out “to do something special.”He only wanted people who would perform constant acts of service with the no-nonsense attitude that they will simply do what needs doing. “Only a person who feels his preference to be a matter of course, not something out of the ordinary, and who has no thought of heroism but only of a duty undertaken with sober enthusiasm, is capable of being the sort of spiritual pioneer the world”

The Road to Character by Brooks, David
http://www.amazon.com/dp/B00LYXV61Y