[Hautboys and torches. Enter, and pass over, a Sewer and divers
Servants with dishes and service. Then enter Macbeth.]

MACBETH.
If it were done when 'tis done, then 'twere well
It were done quickly. If the assassination
Could trammel up the consequence, and catch,
With his surcease, success; that but this blow
Might be the be-all and the end-all--here,
But here, upon this bank and shoal of time,--
We'd jump the life to come. But in these cases
We still have judgement here; that we but teach
Bloody instructions, which being taught, return
To plague the inventor: this even-handed justice
Commends the ingredients of our poison'd chalice
To our own lips. He's here in double trust:
First, as I am his kinsman and his subject,
Strong both against the deed: then, as his host,
Who should against his murderer shut the door,
Not bear the knife myself. Besides, this Duncan
Hath borne his faculties so meek, hath been
So clear in his great office, that his virtues
Will plead like angels, trumpet-tongued, against
The deep damnation of his taking-off:
And pity, like a naked new-born babe,
Striding the blast, or heaven's cherubin, hors'd
Upon the sightless couriers of the air,
Shall blow the horrid deed in every eye,
That tears shall drown the wind.--I have no spur