We grew up in a very material-lacking socialist society, but today China is a capitalist society. It's very materialistic. It's full of desire and luxury goods.
If you have a great many desires, you will gradually eliminate them one by one, until you allow certain desires to dominate and the others to die away.
Superstitions are all materialism, because they are all based on the consciousness of body, body, body. No spirit there. Spirit has no superstitions - it is beyond the vain desires of the body.
Macbeth's deed is done in horror, and without the faintest desire or sense of glory- done, one may almost say, as if it were an appalling duty; the instant it is finished, its futility is revealed to Macbeth as clearly as its vileness had been revealed beforehand