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"The moment you doubt whether you can fly, you cease for ever to be able to do it."

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The mind is nature's answer to the challenges of existence.

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

質量在價格被遺忘后仍會被長久記住。

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones。