We should conceive of ourselves not as rulers of Earth, but as highly powerful, conscious stewards: The Earth is given to us in trust, and we can screw it up or make it work well and sustainably.
Of tobacco and its consequences, I will say nothing but that the practice is at too bad a pass to leave hope that anything that could be said in books would work a cure. If the floors of boarding-houses, and the decks of steam-boats, and the carpets of the Capitol, do not sicken the Americans into a reform; if the warnings of physicians are of no avail, what remains to be said? I dismiss the nauseous subject.