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You can discover what your enemy fears most by observing the means he uses to frighten you.

The greatest blessing of our democracy is freedom. But in the last analysis, our only freedom is the freedom to discipline ourselves.

We need to design policies that work with human psychology, not against it.

能源的未來不是要在化石燃料和可再生能源之間做出選擇，而是找到確保可靠性、可負擔(dān)性和可持續(xù)性的正確平衡。

我們做出的每一個決定都應(yīng)該反映我們對更健康星球的承諾。

Leadership in mining means making tough decisions for long-term benefits.

Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's a day you've had everything to do and you've done it.