You don't have to know a lot of things for your life to make a lasting difference in the world. But you do have to know the few great things that matter, and then be willing to live for them and die for them. The people that make a durable difference in the world are not the people who have mastered many things, but who have been mastered by a few great things. If you want your life to count, if you want the ripple effect of the pebbles you drop to become waves that reach the ends of the earch and roll on for centuries and into eternity, you don't have to have a high IQ or EQ; you don't have to have good looks or riches; you don't have to come from a fine family or a fine school. You have to know a few great, majestic, unchanging, obvious, simple, glorious things, and be set on fire by them.
Never forget that you are one of a kind. Never forget that if there weren't any need for you in all your uniqueness to be on this earth, you wouldn't be here in the first place. And never forget, no matter how overwhelming life's challenges and problems seem to be, that one person can make a difference in the world. In fact, it is always because of one person that all the changes that matter in the world come about. So be that one person.
When I was younger, my ambition was to be one of the people who made a difference in this world. My hope still is to leave the world a little bit better for my having been here. It's a wonderful life and I love it.