Determine never to be idle. No person will have occasion to complain of the want of time who never loses any. It is wonderful how much may be done if we are always doing.
I also hope that I am occasionally involved in projects that touch other people in ways that make their lives a little better, more interesting for the moment that makes them think.
For years, I've been wondering what could happen to nuclear submarines when they dive and disappear from the surface of the earth for months, without a trace. No one really knows where they are.

