Imaam Ibn al-Qayyim رحمه الله said:
"Removing the mountains from their places is easier than removing
these four characteristics (of arrogance, envy, anger and lusts) which a person
has been afflicted with.”
Al-Fawaaid pg.231, Daar ‘Aalim al-Fawaaid print, 2nd
edition
Translation source: MarkazMuaadh.com