Drink deeply from good books.
Stay the course. When thwarted try again; harder; smarter. Persevere relentlessly.
Why do we dread adversity when we know that facing it is the only way to become stronger, smarter, better?
Don't mistake activity with achievement.
What a leader learns after you've learned it all counts most of all.
Each of us has a huge capacity to learn and to achieve. Being ever alert makes the task of becoming all we are capable of becoming so much easier.