Commit yourself to a mighty purpose.
Nothing is more expensive than a missed opportunity.
Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.
Share your knowledge and you become immortal.
Love your work, then you will find pleasure in mastering it.
Ask an older person you respect to tell you his or her greatest regret.