This is from Kenneth Branagh's excellent film version of Shakespeare's Henry V. I read the play in 10th grade, and have been fond of it ever since.
The St Crispan's speech given in the play the night before the Battle of Agincourt is one that rouses the soul to battle. Plus, it's where Stephen E. Ambrose got the title for his novel-turned into a fantastic miniseries- Band of Brothers.
I'm not silly enough to quote from it beyond what I gave in the title. I like the entire speech, and to quote only a snippet would do it a grave injustice.
Fun fact: Shakespeare could very well have been a recusant (A Catholic, who refused to attend Anglican services).