Banquo exclaims, aside, to himself or Macbeth, ‘What! can the devil speak true?’ He now believes that the Witches were real beings and the ‘instruments of darkness.’ When Macbeth, turning to him, whispers,
When those that gave the Thane of Cawdor to me
Promised no less to them?
he draws with the boldness of innocence the inference which is really occupying Macbeth, and answers,
Might yet enkindle you unto the crown
Besides the thane of Cawdor.
Here he still speaks, I think, in a free, off-hand, even jesting,[1] manner (‘enkindle’ meaning merely ‘excite you to hope for’). But then, possibly from noticing something in Macbeth’s face, he becomes graver, and goes on, with a significant ‘but,’
And oftentimes, to win us to our harm,
The instruments of darkness tell us truths,
Win us with honest trifles, to betray’s
In deepest consequence.
He afterwards observes for the second time that his partner is ‘rapt’; but he explains his abstraction naturally and sincerely by referring to the surprise of his new honours; and at the close of the scene, when Macbeth proposes that they shall discuss the predictions together at some later time, he answers in the cheerful, rather bluff manner, which he has used almost throughout, ‘Very gladly.’ Nor was there any reason why Macbeth’s rejoinder, ‘Till then, enough,’ should excite misgivings in him, though it implied a request for silence, and though the
