天道之数，至则反，盛则衰。
自然万物发展变化的规律是：发展到尽头，就会走向反面；发展到极盛之后，就会趋于衰落。
The best time to plant a tree was 20 years ago. The second best time is now.
The best way to scale a program is to scale it.
The magic, the wonder, the mystery and the innocence of a child's heart are the seeds of creativity that will heal the world.
当遗憾取代梦想时，一个人才算老了。