The only fence against the world is a thorough knowledge of it.
We are not victims of our circumstances. We are products of our decisions.
We don't judge content, we just build bridges.
The faster technology evolves, the more we must invest in human wisdom.
就因为你喜欢我的东西，不代表我就欠你什么东西。
学习数学的唯一方法就是做数学。