一本书之所以成为一本“好书”，主要是因为我们在对的时候读了它。
Most of what makes a book 'good' is that we are reading it at the right moment for us.
自然界中没有线条，只有相互映衬的色彩区域。
The difference between theory and practice is that in theory, there is no difference between theory and practice, but in practice, there is.
永远不要停止学习，世界总是在变化。
