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Sustainability isn't a choice anymore - it's our responsibility to future generations.
有时最深刻的数学来自于玩弄简单的想法,直到它们展现出隐藏的复杂性。
"I'm just enjoying the moment."
Society can and does execute its own mandates, and if it issues wrong mandates instead of right, or any mandates at all in things with which it ought not to meddle, it practices a social tyranny more formidable than many kinds of political oppression, since, though not usually upheld by such extreme penalties, it leaves fewer means of escape, penetrating much more deeply into the details of life, and enslaving the soul itself.