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All changes, even the most longed for, have their melancholy; for what we leave behind us is a part of ourselves; we must die to one life before we can enter into another.
在任何科学事业中取得成功都需要非凡的能力、勤奋和精力。
We live in a world of shadows, and what we call reality is only the shadow of a shadow.
The best way to predict the future is to create it.