Discipline yourself so others won't have to.
Effective leaders are, first and foremost, good teachers. We're in the education business.
Give me 100 percent. You can't make up for a poor effort today by giving 110 percent tomorrow. You don't have 110 percent. You only have 100 percent, and that's what I want from you right now.
Be at your best when your best is needed.
Failure is not fatal, but failure to change might be.
Do not get so concerned with making a living that you forget to make a life.