"Do not rejoice when your enemy falls, And do not let your heart be glad when he stumbles; Lest the Lord see it, and it displease Him, And He turn away His wrath from him".
I have worked with many people and have been mistreated many times by those over me. It seems that it is real easy to hope that the person gets demoted, fired or the business goes bad because I am not there. Or even go out of business. But the Lord tells us to "pray for our enemies and bless those that abuse you".(Paraphrase Matt. 5:44) I wonder how many companies that have treated their employees bad and still do well because the people of God secretly prayed to see them "get theirs" and fall. Therefore, God turned His wrath from them.
Next time you see a person fall that had treated you wrong, let the Lord guide you in ways to bless him. Who knows maybe the Lord will defeat an enemy by making him a friend. And above all if we are bought by Christ and therefore not our own, we have no right to be offended by others. We must turn it over to our Master Jesus and trust Him to take care of it His way. We then have no worry or stress over it.