要理解现在，我们必须理解过去。
To understand the present, we must understand the past.
引用《像马一样思考》
If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.
The streets were dark with something more than night.
看见先于言语。孩子在能说话之前就已经在看和辨认了。