世界是由文字构成的，如果你知道构成世界的文字，你就可以随心所欲地塑造它。
Don't watch the clock; do what it does. Keep going.
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all doing direct the other way.
数学之美不仅在于其抽象的优雅，还在于其建模和解决现实世界问题的深刻能力。