法律义务的概念对于理解法律至关重要。
The concept of legal obligation is central to the understanding of law.
"Memory is a strange thing, it doesn't work like I thought it did. We are so used to thinking of it as a camera or a tape recorder, but it's not like that at all. It's more like a painter, who adds and subtracts elements according to his own rules."
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.