For me, what Macbeth is about is people who cannot face their fears and pain and instead of facing them and going beyond, they just run away and they try to cover this with power and violence, but it doesn't work.
Should pain and suffering, sorrow, and grief, rise up like clouds and overshadow for a time the Sun of Righteousness and hide Him from your view, do not be dismayed, for in the end this cloud of woe will descend in showers of blessing on your head, and the Sun of Righteousness rise upon you to set no more forever.