It is myself I mean: in whom I know
All the particulars of vice so grafted
That, when they shall be open’d, black Macbeth
Will seem as pure as snow, and the poor state
Esteem him as a lamb, being compared
With my confineless harms.

– William Shakespeare

Macbeth, Act 4, Scene 3. Malcolm plays a little game of deception with Macduff as a test of his loyalty and to ensure that he is not working with Macbeth. So Malcolm lies, saying he himself is so full of vices that the “black Macbeth” would seem as white as snow, an example of simile. Using another simile, Malcolm says that poor Scotland would think of Macbeth as a lamb, in comparison to him and his limitless wickedness.