‘Fill me from the crown the the top full of direst cruelty!’
macbeths overwhelming ambition is one of his fatal flaws of his tragic character
Shakespeare show some positive ambition as long as it remains inside the natural order or looks to restore it for example Macduff and Malcolm are driven by ambition to get rid of Macbeth for Scotlands sake and restore legitimate blood line
Macbeth describes his own fear as his ambition. He caused his ambition ‘vaulting’ suggesting it is too extreme. Shakespeare shows this leads to murder and madness for the tyranny for the whole country.