Without hard work, nothing grows but weeds.
Only the educated are free.
Either you run the day or the day runs you.
Wherever you are - be all there.
Things do not happen. Things are made to happen.
Always desire to learn something useful.
Never complain and never explain.
Leap, and the net will appear.
I can, therefore I am.
Be gentle to all and stern with yourself.
I have taught history on the high school and college levels, and am or have been a lecturer at the Smithsonian, The National Institutes of Health, and numerous colleges and universities, mostly on science fiction and technology subjects.