拥有自由、书、花和月亮,哪个人会不快乐?
你要为你做的每一件血腥的事和你没有做的每一件事付出代价。你不能选择不付出代价。你要选择你要服用哪种毒药。仅此而已。
The beauty of mathematics lies not only in its abstract elegance but also in its profound ability to model and solve real-world problems.