How does Imam Khomeini explain that a believer should never slander others?

He whose Guardian is God, the Blessed and Exalted, and who is taken by Him out from the darkness never commits another sin.

According to Imam Khomeini, do your work with pure intention and for the pleasure of God

Hadrat Khadija, the beloved wife of holy prophet was a perfect woman and role model for believers

Imam Khomeini warned against becoming aggressive during academic discussions

Imam Khomeini advised the seminary figures and scholars to remain calm and exercise patience during the discussions. Imam explains if you see that the other party is justified in its argument, you are expected to admit your fault and confirm what opponents say.

Imam invited believers to perform actions with sincere intentions

Imam Khomeini explained that whenever you realize that the Satan interferes in your affairs, you should immediately know that your actions are not performed with sincere intentions and are not meant for the Almighty.

Imam Khomeini’s famous work “Forty Hadith” contains enriched discussion

Imam Khomeini’s works, books contain treasure of mysticism and a range of discussions on spirituality which are useful for the entire humanity.

According to Imam, how a believer can discover his weaknesses and faults?

How Imam Khomeini does sheds lights on characteristics of a true believer?