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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.

I'm not a rapper, I'm a African legend.

The future belongs to those who understand that doing more with less is compassionate, prosperous, and enduring.

Happiness is not having what you want, but wanting what you have.

自然是最偉大的藝術家。

The greatest happiness of a teacher is to send groups of children to the other shore of their ideals.