From SF Giants General Manager Brian Sabean in a New York Times article by Tyler Kepner - A Giant Among Giants:
"I never really understood, till you do this a while - and this is my 18th year - that when you think it's getting easier, it's actually getting harder to do the job. Because you're always trying to do something bigger and better. You're always trying to reinvent yourself, reinvent the organization. It keeps you fresh."