As you know, God's ways are high above our ways and his thoughts high above ours. We live a very limited time and see only what's happening at the moment, whereas the Lord knows all of the past and the future, and things have been evolving according to his plan since our creation. When we see someone dies unexpectedly at a relatively young age, we see it as a tragedy. What if the soul of the deceased goes directly to heaven? And when we see someone who has lived to a ripe old age and is still going strong, we envy him and consider him lucky. What if later he dies and does not make heaven? Only God knows what is going on. We need to focus upon following the Lord alone and not dwell upon things we do not really know.