What are some of important discussions Imam included in his famous work “Forty Hadith”?

The very first hadith is on Jihad of the self that aims at self-improvement elevating oneself through self-control and self-discipline and shun pride (kibr), ostentation/show-off (riya), self-conceit (ujb), envy (hasad), love of the world, anger (ghadhab), prejudice (asabiyyah) and hypocrisy (nifaq). In his collection, Imam Khomeini has included the ahadith that help us elevate our status through intellect (tafakkur), trust in God (tawakkul), man’s natural instincts to seek out God, meeting with God and to fear (khawf) Him.