You must be the change you wish to see in the world.
你必须成为你希望在世界上看到的改变。
The city remembers what its people forget.
If you enter this world knowing you are loved and you leave this world knowing the same, then everything that happens in between can be dealt with.
The farmer is the only man in our economy who has to buy everything at retail, sell everything at wholesale, and pay the freight both ways.