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对一项神圣事业的信仰相当程度上替代了已经失去的自信。
Faith in a holy cause is to a considerable extent a substitute for the lost faith in ourselves.
If you're not willing to fail, you're not ready to succeed.
We are all just echoes of something that once was.
在科学中,我们必须接受我们最珍视的理论可能是错误的这种可能性。
The world is a cruel place, but it is also beautiful.