心灵应通过对自然的研究被引导到对上帝的认识。

可持续性不仅仅是植树；而是在正确的地方种植正确的树木，并确保它们世代繁茂。

Man is so much the voice of his interest that it is not enough to make him see the right， but you must make him feel it.

You never know what worse luck your bad luck has saved you from.

幸福不是现成的东西。它来自于你自己的行动。

质量不是一种行为，而是一种习惯。