数学中真正的挑战不是解决问题，而是提出正确的问题。
The true challenge in mathematics is not solving problems, but asking the right questions.
One should always play fairly when one has the winning cards.
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.