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Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.

Try never to be the smartest person in the room. And if you are, I suggest you invite smarter people... or find a different room.

在冬天的深處，我發現我心中有一個不可戰勝的夏天。

可持續發展不是一種選擇，而是我們對后代的責任。