I keep telling people ... If they really believed Heaven was real and so great, they wouldn't be afraid of dying. They'd actually be anxious to go. Nor would they grieve when someone died. (I mean, unless they thought that person was going to Hell. But very few think that of their own family.)
If they really believed Heaven was real and so great, they wouldn't be afraid of dying---some people just fear change, regardless of how good they think it will be for them.
They'd actually be anxious to go---not if they see a connection between what they do and learn here and how much they will enjoy heaven.
Nor would they grieve when someone died---Grieving is a normal response to a loss of any kind. (I wasn't really ready to see my kids go off to college, no matter how great it would be for them.)