Twenty years from now, you will be more disappointed by the things you didn’t do than the ones you did.So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. （注：这句说话被部分人质疑不是由马克·吐温所说的。）
释义：善于用兵的人，会顺应天地的规律，与之同行。这句话强调用兵之道在于顺应自然。