If we say that we have no sin, We deceive ourselves, and there's no truth in us. Why then belike we must sin, And so consequently die. Ay, we must die an everlasting death.
Christopher MarloweFAUSTUS. [Stabbing his arm.] Lo, Mephistophilis, for love of thee, I cut mine arm, and with my proper blood Assure my soul to be great Lucifer's, Chief lord and regent of perpetual night!
Christopher Marlowe