“The universe is probably littered with the one-planet graves of cultures which made the sensible economic decision that there’s no good reason to go into space–each discovered, studied, and remembered by the ones who made the irrational decision.”XKCD

“We went to the moon; do we really have to go to Mars?”
“Because it’s next.”The West Wing

“For all our failings, despite our limitations and fallibilities, we humans are capable of greatness.”Carl Sagan

Convinced yet?

Yours Truly,
The Future of Humanity