Hamlet
ACT IV, Sc. 4, Lines 58-68: Do you believe Hamlet's closing vow?
Hamlet. O, from this time forth
My thoughts be bloody or be nothing worth.
[Exit]
Hamlet. O, from this time forth
My thoughts be bloody or be nothing worth.
[Exit]
Judging by the violence that follows, I'd have to say that Hamlet made very good on that vow.
Hamlet