There are countless stories of people who half died and say they went up to heaven and saw a great light like one non jewish lady said if she could put all the pleasures of her life times by a million it could come to the pleasure of that great light another story a idf soldier died and said he saw the three previous gedolim who had died in the last year at the beis din shel maaloh and he said that everyone’s clothes are clean but his were dirty because he didn’t keep the mitzvahs properly and besides he saw a great light of which the enjoyment he couldn’t describe. There is a book titled we are not alone which happenes to be a great read from cover to cover also has in it some of these stories.