Here are three (3) things that
cannot be cured to most people:

Man's propensity or proclivity for greed, exploitation and selfishness.

Allah Subhanahu Wa ta’ala says that everyone is preoccupied by the love of the world, its delights and its adornments. This distracts us from seeking the Hereafter and desiring it. The repentance is delay until death comes to us and we visit the graves, thus becoming its inhabitants.