Personally I know that there is 'Life' beyond this physical plane 'life'. I've remembered many of my 'past lives' since about age 5 and, I've also remembered a couple of my physical deaths and my
'transition to the other side' so to speak. In other words I retained full conscious awareness through the transition out of my physical body (death) and into the nonphysical realm. Plus I've psychically seen people who've passed over and are still here enough to be seen and communicated with! I've also had a few special encounters with a highly advanced Teacher who passed over in the early 1980's who came through to both me and my sister after he'd "died", so this experience is pretty good evidence for those hard core disbelievers!
Here's some of what happened with him.
I first met this man in the mid 1970's when he was teaching Astrology. He was in his late 70s then. When he was only a child his parents, after seeing his natal chart, packed him off to India with an uncle to be trained in many different of the 'Arts'. When he was about 21, he returned to the USA with all sorts of east Indian wisdom teachings. Long story short.....he was well trained in astrology, gemology, numerology, tantra, functioning outside of his physical body with full conscious awareness, and many other things, plus things he never told me about! He was a very special man, special Teacher.
He'd told a couple of us students that he knew when he was going to physically die (astrologically) and so he went to his doctor 2 days before his actual physical death to prevent them from doing an autopsy. At the time of his death my sister lived in another state and didn't know that he'd died. I didn't want to call her with this news until a week had passed and later it was revealed why I even did that!
About 3 days after he died, my sister had a lucid dream in the middle of the afternoon and this man, this Teacher, was in her dream. She told me that he'd showed up in her dream to give her a special gemstone that she needed at that time to help her heal some body problems she'd been having. In this dream he gave her a gemstone and they talked a bit also. The dream ended and she woke up and wondered about the gemstone. After a bit she went back to sleep and had a second dream with him! In this second dream he just popped in and said to her,
"Oh, I forgot to mention, I've died!" and with that, he left and she woke up a second time....very very upset. The next day she called me and told me about her 2 dreams with him and when she finished I had to tell her that indeed, he had physically died a few days earlier.
I've also had a couple of dreams with him many years after his physical death where he gave me some astrological information I needed about people's unknown birth times. Much of this is rather personal so I won't go into the details but just say that all of what he told me in the dreams, I've learned after-the-fact, to be correct.
There's much more but it's sooooo
paranormal that many people simply wouldn't believe it and would probably then not believe what I have shared.
I remember hearing Dannion Brinkley (who's died twice himself) say that life on the other side makes this physical life seem like being dead! From what I personally remember, I totally agree.