Macbeth
WHO said: "is this a dagger which i see before me,/ the handle toward my hand? come, let me clutch thee./ i have thee not and yet i see thee still,/ art thou not, fatal vision, sensible/ to feeling as to sight? or art thou but/ (rest in details)
...."a dagger of the mind, a false creation,/ proceeding from the heat-oppressed brain?/ i see thee yet, in form as palpable/ as this which now i draw./ thou marshall'st me the way that i was going;/ and such an instrument i was to use." who said it and what does it means?