Roadster in Space

 "That which exercises reason is more excellent than that which does not exercise reason; there is nothing more excellent than the universe, therefore the universe exercises reason." - Zeno of Citium

Help Wanted

 "We are at the mercy of whoever wields authority over the things we either desire or detest.  If you would be free, then do not wish to have or avoid things that other people control, because then you must serve as their slave." - Epictetus

Rock Concert!

 "We ought to do good to others simply as a horse runs, or a bee makes honey, or a vine bears grapes season after season, without thinking of the grapes it has borne." - Marcus Aurelius

Molten Salt Reactors

 "It is more civilized to make fun of life than to bewail it." - Lucius Annaeus Seneca

N.S. Savannah

 "Death smiles at us all; all we can do is smile back." - Marcus Aurelius