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Do not follow where the path may lead. Go instead where there is no path and leave a trail.

Life is too short to be anything but happy.

"A book is a friend that never judges you."

人的自由是他的限制。

The real challenge is not in solving the equations, but in understanding what the solutions mean.

你的時間有限，不要浪費(fèi)在過別人的生活上。