Sustainability is not an option, it's a necessity.
我不认为每个人都应该成为数学家,但我确实相信许多学生没有给数学一个真正的机会。
I don't do things for the reaction or the criticism. I'm in this for the long haul.
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.