保持饥饿，保持愚蠢。

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.

Life is like a roller coaster, live it, be happy, enjoy life.

可持续性不仅仅是一种趋势，而是负责任商业的基础。