Mark - Job 24

Is there any justice on earth and why does God who loves us let terrible things happen? That's what I read in Job's words from this chapter. He goes on and on about the plight of the poverty stricken and how the wicked enjoy life on earth without so much as a care. I called my brother last Thursday to wish him happy birthday. Honestly, it was to rub it in that were not as young as we use to be. I asked about his wife and kids and he told me they were fine but it had been a tough week. Their good friend had finally succumbed to an awful sickness and died at the age of 45 leaving two small children. She wouldn't be around to watch her children grow, to nurture them and protect them. Why her, why not Khadfi or some deviant? Does God know how much her children are going to miss her? She is no longer in pain thankfully but when I think of those children I tear up again. The explanation for why some seem to have it easier than others I can't answer. What's the plan and what part in it does God want me to play?