In other words, if you are seeding the industry - whether in your own organization or not- with great people who really learned from you how it should be done, it reflects on you and your influence on the industry overall.
Sounds simple? It's not. Mentoring - or the act of actually wanting your people to do great work, grow, and eventually move on at times - is a rare art. And it's hard to do, when everyone is so busy working with clients or senior executives. But making the effort to develop others pays often-unseen dividends.