It’s normal to ask “Why? Why do these terrible things have to happen? Why, God, couldn’t there be another way?” when there is a death or a terrible tragedy. I said this myself a couple weeks ago when I found that a friend had died at a young age, leaving a husband of over 20 years and two teenage children who I’m sure miss their mom terribly. Jesus Christ himself said much the same to His Father in the Garden.
It’s normal to grieve and just feel terrible. The loss is worst for those who are left behind here on earth and won’t have their loved one in their daily earthly life any more.
It’s normal to have all the feelings and ask all the questions you are asking.
However, for the person who is gone from the earth, our belief is that with the mercy of God they are actually in a better place. Or if we have concern about this, we can pray to God for their soul, that they will reach the “better place”. Life continues after death. It’s just like somebody moved to a distant foreign land with no telephone or skype or web or mail, so you can’t communicate with them in the physical way, but they haven’t vanished into the ether, nor are they feeling any more earthly pain and suffering .
There is a tendency on earth to think of death as a horrible thing, and it is horrible for those who have been left behind and grieve, and also for any deceased souls who reject God. But for many who are saved, death actually isn’t horrible. It’s just a switch to a different type of life. I hope that doesn’t sound too awful to say.
I don’t find pondering whether a death is “God’s will” to be too helpful. I don’t believe we here on earth are really capable of understanding the big picture of God’s Will until we ourselves die and perhaps only then, if God wishes, certain things will be explained. The fact is, if you’re alive on earth you are going to die sometime. Even Jesus died. Death is a fact of life. When it is your time to die, you will die. It’s probably not even so bad for the person who dies, assuming they accept God. It’s actually worse for those of us left on earth trying to cope without the dead person. The person themself may very well be just fine.
I will pray for your colleague who died to go to Heaven and for the one who survived to fully recover.