When a loved one dies, there is a necessary grieving process.
It is not appropriate to tell the one who left behind that he or she should not be suffering a loss. It does not help to say all the right things. That is why the Proverb says that we should grieve with those who grieve, and weep with those who weep.
Death is a confrontation. It is never easy. And it leaves a vacuum. In is not possible to live, feel and think as though it never happened.
For we who have Hope, the pain is sweet. For those who have no hope, it is a yawning abyss.
Write a letter or make a call. Offer to pray for comfort. Offer to be available. Share verses of comfort, not verses of correction.
Pray privately for the grieving one - aloud.