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数学直觉就像肌肉一样 - 通过锻炼会变得更强大。
The more you dwell in the past, the less you prepare for the future.
I'm not afraid to fall in love. I'm afraid to fall for the wrong person again.
In science, we must be open to the possibility that our most cherished theories could be wrong.
Fearless is not the absence of fear. It's not being completely unafraid. Fearless is having fears. Fearless is having doubts. Lots of them. Fearless is living in spite of those things, every day.
The relation between what we see and what we know is never settled.