children's progress is not depends on the age, but depends on the freedom to watch everything around him.
儿童的进步不是取决于年龄，而是取决于能够自由地观看他周围的一切。
道不喜欢杂乱，杂乱就会繁多，繁多就会扰乱，扰乱就会忧虑，忧虑就无法挽救。
The more you know, the more you realize you know nothing.
要快乐，我们不必太在意别人。