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The person who dumps garbage into your mind will do you considerably more harm than the person who dumps garbage on your floor, because each load of mind garbage negatively impacts your possibilities and lowers your expectations.

What's it like to envision the ten-thousand-year environmental impact of tossing a plastic bottle into the trash bin, all in the single second it takes to actually toss it? Or the ten-thousand-year history of the fossil fuel being burned to drive to work or iron a shirt? It may be environmentally progressive, but it's not altogether pleasant.

To me, I think people who don't think it's a big deal to toss a plastic bottle in the garbage are not only being irresponsible, but I think they're being disrespectful of all the other humans on earth.

If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.

You have to be prepared to take a spill.

Any fool can wash himself, but every wise man knows that it is an unnecessary labour, for nature will quickly reduce him to a natural and healthy dirtiness again.

You can lead a bureaucrat to water, but you can't make him think.

The worst thing in the world that can happen to you if you're an engineer that has given his life to something is for someone to rip it off and put their name to it.