Sorry AdamS. Fraid I can't answer that and like you I had experienced nothing, prior to Tuesday, that would make encourage me to believe there was something to look forward to after death but what I can do is give you an example of what he said just to validate my point.
My mum suffered from Alzheimers Disease and her mental health worsened by the day. So much so that when I visited he in the care home where she was looked after she would refer to my dad and her parents as if they were still alive and asked how they were, had I seen them etc etc.
Initially I would correct her and remind her that they had all died and naturally this would upset my mum greatly.
To avoid this the carers explained to me that mum was now living in her own happy, little world and that to avoid upsetting her they suggested that I should 'play along' with her ie say that they were fine and that I had seen them earlier that day etc. Naturally this I did until the day she died.
On Tuesday, through the medium, my mum said to me that during the times I visited her she now knows that I played along with her just to avoid upsetting her!
How?
I suppose you could argue the point that the medium perhaps knew how to converse with mentally ill people but not once was her ilness or mental health even discussed.