Nevertheless, as in the earlier scene with his wife, Macbeth eventually capitulates. The urge to become king is now strong in him. In his final lines, as he ascends to the king's chamber, he imagines himself as the personification of Murder itself, stealthily making its way towards its victim. The change of tone to one of high rhetoric and classical allusion (Hecate, Tarquin) may seem out of place, but not if we imagine Macbeth putting on a "mask" of language in preparation for the murder. The distinction between word and deed in the last line is an idea that occurs frequently in Shakespeare. What we say and what we do are frequently very different matters. But in the final couplet, Macbeth seems to transfer his own doubts concerning the afterlife to Duncan: Whether the king will go to heaven or hell is now an academic matter; ironically, for Macbeth himself, the outcome is likely to be more certain.
