No tomorrow. The day of man's salvation is today.
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Now that I'm a grandfather myself, I realize that the best thing about having grandkids is that you get the kid for the best part of the ride - kind of like owning a car for only the first 10,000 miles. You can have your grandchildren for a couple of days and then turn them back over to the parents.
My parents didn't know much science; in fact, they didn't know science at all. But they could recognize a science book when they saw it, and they spent a lot of time at bookstores, combing the remainder tables for science books to buy for me. I had one of the biggest libraries of any kid in school, built on books that cost 50 cents or a dollar.
I've learned the importance of changing people's minds at the grassroots level so that whoever does run will have a much better chance of encountering public opinion that reaches a critical mass and brings about a change not only in White House policies but in the Congress and in the state legislatures and all around the world.