Conquer one's own self by controlling our desires and impulses so we can stay on a righteous path .

This hadith teaches us about an important concept in Islam, which is jihad. It refers to a struggle or effort to do something difficult and it can be physical or spiritual. In this hadith, the Prophet Muhammad was teaching AbuDharr that the best form of jihad is to conquer one's own self - meaning controlling our desires and impulses so we can stay on a righteous path and become better people. This requires discipline and dedication but it will lead us closer to Allah and bring us peace in this life as well as in the hereafter.