If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
"The act of reading is as creative as the act of writing."
宇宙不仅比我们想象的更奇怪，它比我们能想象的还要奇怪。
The Romans would never have found time to conquer the world if they had been obliged first to learn Latin.