Purchase the most recent tourist guidebook to your home town or region. You’ll learn a lot by playing the tourist once a year.

But there is no such liberty as the power to dispose of what we please.

It's important to follow your dreams and do what you love.

For the best results with your children， spend only half the money you think you should， but double the time with them.

数学的艺术在于发现包含所有普遍性萌芽的特殊案例。

Creativity is about permission - giving yourself permission to try things.