Without hard work, nothing grows but weeds.
If you can dream it, you can do it.
Expect problems and eat them for breakfast.
Always desire to learn something useful.
Wherever you are - be all there.
If you've got a talent, protect it.
The wise does at once what the fool does at last.
Begin to be now what you will be hereafter.
Either you run the day or the day runs you.
To know oneself, one should assert oneself.
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.