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Never stop learning; the world is always changing.
真正的美国发现还在我们面前。我们精神、我们人民、我们强大而不朽的土地的真正实现尚未到来。
Quality is not a position; it is a practice.
你停止尝试的那一刻,就是你开始死亡的那一刻。
We say of some things that they can't be forgiven, or that we will never forgive ourselves. But we do—we do it all the time.
Some people are extraordinarily good at knowing the limits of their knowledge because they have to be.
Every day is a new opportunity.