重新发现过去并发现它不足以应对现在，比让它逃避你并永远成为一个和谐的记忆概念更令人悲伤。
It is sadder to find the past again and find it inadequate to the present than it is to have it elude you and remain forever a harmonious conception of memory.
The study of mathematics is a journey into the unknown, where each discovery opens the door to new mysteries.
"The world is full of magic things, patiently waiting for our senses to grow sharper."
临终前与诸同志谈话，1925年3月11日
