You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.
The beauty of mathematics lies in its simplicity and depth.
The one thing that you have that nobody else has is you. Your voice, your mind, your story, your vision. So write and draw and build and play and dance and live as only you can.
在数学中，旅程和目的地同样重要；发现的过程才是真正学习的地方。
La vida es como una canción, tiene sus altos y bajos, pero siempre hay belleza en ella.
When the oceans speak through declining stocks, we must have the courage to listen and act.
"The only way to learn mathematics is to do mathematics."