人心险于山川，难于知天。
人心比山川更险恶，比了解天象更困难。
学习原理在不同物种间是通用的。
正是在我们最黑暗的时刻，我们必须集中精力看到光明。
We don't inherit the ocean from our ancestors; we borrow it from our children.
Every person must have a thought that changes them, or a book, or a word, or a moment; and if they don't, their life is wasted.
You can tell the deepest truths with the lies of fiction.