The psychic abilities are actually your 5 senses taken to the sensitive psychic level as you add 2 more: intuition from the gut and I know from the heart - it neither sees nor hears, it just knows.
Being a medium is taking these psychic sensitivities and attuning to a spirit guide to bring comfort and
peace from loved ones who have passed to the next existence. This helps us prove that life continues and the afterlife is a reality.
And if you take the spirit explanation it is amazing how much the Bible and other spiritual literature makes sense. It also makes sense of the theory of reincarnation.