Well as you've demonstrated, you have no proof for what you declared to be a fact.
Furthermore:-
1. Why would your loved ones come back physically if their spirit & soul had moved into another *dimension?*
2. Also, I never said I had proof but did say I had certainty.
Let me put it this way, when you jump into an Uber or board a Jumbo Jet then you place your safety and potentially your life in the hands of one individual. Why do over 99% of people choose to do that? While they cannot
guarantee the ability or performance of that driver/ pilot, they base that trust on their history, ie their past record up to that point. That is open to scrutiny, while the future is not!
When we look at what Christ said about life after death, that future can't be examined neither can it be proved beyond doubt, but His past record
can be examined. Are the words of Christ true in everything else He said, some 2 millenia after he said them? Yes, they are found to be 100% true. So His words ARE reliable, trustworthy and absolutely true; more than this, there was at least a 400 year gap in history between the end of the Old Testament and the arrival of Christ at Bethlehem. In that Old Testament there are no less than 353 individual prophecies about Jesus including where he would be born, many things about his life, the means by which he would die, and the fact that he would rise from the dead.
A study was done that looked at the probability of just EIGHT of those 353 prophecies being fulfilled in one individual, and this short
clip explains the likelihood of that happening!
Christ is unique, His Words are true, what He says re Heaven & Hell are true; ignore them if you wish.
You get to decide, and you'll live with that decision for ever.