And if we look at the Christian Bible we find this claim about Heaven:
Revelation 21:4 And God shall wipe away all tears from their eyes: and death shall be no more, nor mourning, nor crying, nor sorrow shall be any more, for the former things are passed away.
Now, for Christians who also believe that unredeemed 'sinners' will be put into Eternal torment in Hell this raises the specter of someone (say a parent) having a dearly loved one (such as a child) suffering eternal torment in Hell while they are without mourning or sorrow or tears for their loved one.
This is why I sometimes refer to Christian Biblical Heaven as Stepford Heaven.