抽象的力量在于它允许我们忽略与当前任务无关的细节。
The power of abstraction is that it allows us to ignore details that are not relevant to the task at hand.
处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。
History is not just about kings and battles—it's about the people who lived through it.