Lessons from Nahjul-Balagha
1- The words of Imam Ali (AS) - Beware of disobeying Allah in solitude
2- The words of Imam Ali (AS) - The most serious sin is that which the doer considers light
3- The words of Imam Ali (AS)- Contentment is a wealth that does not exhaust
4- The words of Imam Ali (AS)- Two greedy persons never get satiated
5- The words of Imam Ali (AS)- Backbiting is the tool of the helpless