The secret of change is to focus all of your energy, not on fighting the old, but on building the new.
改变的秘诀是将你所有的精力集中在建设新事物上，而不是与旧事物斗争。
今天我们种下的每一棵树，都是留给素未谋面的后代的遗产。
Stay the course. No matter what happens, stick to your program.