The greatest wisdom is to recognize one's own ignorance.
Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's a day you've had everything to do and you've done it.
The pursuit of mathematical truth is a pursuit of beauty, elegance, and simplicity.
The unknown is not to be feared but to be explored.
最好的侦探是那些永不停止提问的人。