Never stop learning; the moment you do, you stop growing.
永远不要停止学习；一旦停止，你就停止了成长。
数学的研究就像空气或重力——它无处不在，即使你看不到它。
Where I am, I don't know, I'll never know, in the silence you don't know, you must go on, I can't go on, I'll go on.