The events in Act 3 Scene 6 illustrate the political machinations which are threatening to subvert the integrity of the Scottish court.
Lennox's conversation with the the unnamed lord highlights a latent distrust of Macbeth among the Scottish nobles, a distrust which foreshadows Macbeth's eventual death at Macduff's hands. Lennox proclaims that Macbeth 'has borne all things well,' but the shadow of suspicion hovers over his implication that Macbeth's actions have been a little too convenient:
Damnèd fact!How it did grieve Macbeth! Did he not straightIn pious rage the two delinquents tearThat were the slaves of drink and thralls of sleep?
we may againGive to our tables meat, sleep to our nights,Free from our feasts and banquets bloody knives,Do faithful homage and receive free honors.All which we pine for now.
Some holy angelFly to the court of England and unfoldHis message ere he come, that a swift blessingMay soon return to this our suffering countryUnder a hand accursed!