Here's a great story about attitude and understanding the importance of your role from Jon Gordon's "The Energy Bus."
There’s a story about when President Lyndon Johnson visited
NASA and as he was walking the halls he came across a janitor who was cleaning
up a storm, like the Energizer bunny with a mop in his hand. The president
walked over to the janitor and told him he was the best janitor he had ever
seen and the janitor replied, “Sir, I’m not just a janitor, I helped put a man
on the moon.”