Mark Twain once said “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.”
Ayn Rand once wrote:
"Do not let your fire go out, spark by irreplaceable spark in the hopeless swaps of the not quite, the not yet, and the not at all. Do not let the hero in your soul perish in lonely frustration for the life you deserved and have never been able to reach. The world you desire can be won. It exists. It is real. It is possible. It is yours."
