The other night I watched the talented actor, Kevin Spacey, on David Letterman and he quoted his late friend and mentor, Jack Lemmon, who said that once you acquire a level of success in your field it is is your duty and privilege to "send the elevator back down" for others who could benefit from your mentoring or support.
I would say that it is necessary, not only for those in the top of their fields, but everyone along the way. Generosity is a value that is worth cultivating throughout your life. If you want to be mentored, be a mentor.
Photo courtesy of Gideon Tsang.