A. Never quit.
A. An astronaut!
A. "Alright" and "S4!*!!"
A. Giordano Bruno, a Dominican priest who suggested that the universe was filled with stars, planets and life, contrary to "scripture". For this he was burned at the stake in 1600 by the Catholic Church during the "Inquisition". I'd thank him profusely for standing up to religious tyranny and for ultimately leading to our new world where scientific endeavour conquered the ignorance of blind faith.
A. Indiana Jones - no other screen hero comes close.