"Drawing is the honesty of the art. There is no possibility of cheating. It is either good or bad."

Don't wait until everything is just right. It will never be perfect. There will always be challenges, obstacles and less than perfect conditions. So what. Get started now. With each step you take, you will grow stronger and stronger, more and more skilled, more and more self-confident and more and more successful.

数学是理性的音乐。

The best fertilizer is the farmer's shadow.

孩子完全接受——甚至渴望——家规。「在我们家，我们对 X 有一个规矩」是家长设立家庭规范时所需的唯一理由。事实上，「我对 X 有一个规矩」是你给自己设定规范所需的唯一理由。