我们认识的最美丽的人是那些经历过失败、痛苦、挣扎、失去，并找到从深渊中走出来的人。

故事是编织我们人性结构的线索。

There are things that happen and leave no discernible trace, are not spoken or written of, though it would be very wrong to say that subsequent events go on indifferently, all the same, as though such things had never been.

Mathematical intuition often guides the development of algorithms, but it is the rigorous proof that ensures their correctness and efficiency.