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Forests teach us patience—growth takes time, but the rewards are everlasting.

The key is to keep improving, to keep working hard.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

Hope is not a feeling; it is a doable, dramatic action.

I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.

To write is to remember, and to remember is to resist.

The key to credible causal inference is not just the method, but how well the method fits the question at hand.