When God’s spirit is allowed in us it changes our thinking from self, to being used by GOD. Our heart and motives or those of God’s character, we seek His approval, it helps us to discern the evil, that is around us and gives us an alternative to not be afraid,
It also was mercy showned to others as well as Moses and they too had to bear some burdens of others they were complaining to Moses so they also got a share of what Moses had to endure