I'm a bit confused because I think most mystical experiences are through those avenues of normal sensory experiences and rationale. For instance, the way Einstein worked one could say it was a mystical type of trajectory. He would follow his mathematical expressions as a particle to see what they did.
We would need to observe how Einstein literally worked. He was left handed, left handed people have a propensity to use their right hand brain hemisphere as a more dominant feature, as opposed to the left hand hemisphere (which right handed people use more dominantly) which drives our logic and reason. Many creative types are left handed but I believe Einstein had a natural lean towards intuitive guidance and then was highly skilled and obviously very intelligent and productive adding logic and reason to his intuitive drives. I've heard intuition described as the relationship between the head and the heart, a resonant aspect to our being. As you can see from the quote I posted, he followed his intuition, hunches, gut feelings and intuitive drives, also he dreamt about many of his ideas, then applied his faithful servant which was a massively impressive intelligence. Intuition stems from the brain operating in an Alpha brain wave state, it requires, stillness, mediation and a calm environment to present itself to us, focussing on ones breath within a busy environment will assist in that process which is an altered state not driven by sensory means, e.g eyes, ears, mouth, touch, smell etc, although all of those things can amongst certain conditions produce an altered state (or a more intuitive connected feeling) as well.
Mystics will say just the opposite. They talk about finding themselves.
The identity I was referring to was the 'self' as a singular experience, and yes a greater sense of self can be found but can initially be something confronting if one has operated with a strong sense of singular self, or large ego.
Fear of the unknown is a tough one to overcome. I completely understand from where you coming from. But once overcome, there is a whole new world to explore.
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Away from immediate adrenal response to imminent danger fear is created in the mind, our thinking aspect of self, normally projecting a future outcome on our present reality. Of course sometimes that is valid, but mostly its caustic, so I've found that my absence of fear is to find the right amount of balance regarding how I think and feel, and of course that is subject to my own environment and life. So I limit my future projection as much as I can and live in the present, and of course in doing so I release one of our greatest fears, which is the fear of death. Yes that present, 'presents' a whole new world.