数学的乐趣在于努力理解的过程。
The joy of mathematics is in the struggle to understand.
Every artist dips his brush in his own soul, and paints his own nature into his pictures.
平等不仅是一种道德要求，更是一种经济必需。
Every ending is a new chapter.
如果我们的动力是钱的话，我们老早就卖掉公司了，当然那样我们也终究会被后浪拍在沙滩上。