You can't go back and change the beginning, but you can start where you are and change the ending.
"Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them."
The world is full of people who have never, since childhood, met an open doorway with an open mind.
释义：兵法的要旨在于灵活应变，善于了解和掌握军事的本质，行动之前必须先预测敌人的动向。