You are never too old to set another goal or to dream a new dream.
你永遠不會太老而不能設定另一個目標或做一個新的夢。
自由是通過實踐養(yǎng)成的習慣。
I'm not comfortable with comfort. I'm only comfortable when I'm uncomfortable.
Mathematics allows us to see the hidden structures that govern the world around us.