“This is space. It's sometimes called the final frontier.(Except that of course you can't have a final frontier, because there'd be nothing for it to be a frontier to, but as frontiers go, it's pretty penultimate . . .)”
“Thoughts and feelings change sometimes, as one crosses the frontiers.”
“Courage refuses frontiers!”
“What we have been living for three decades is frontier capitalism, with the frontier constantly shifting location from crisis to crisis, moving on as soon as the law catches up. ”
“There is no frontier between being and appearing.”
“Writing will always be the last frontier.”