To be a mystic one need not add anything to their experience, but subtract. A mystic simply sticks with and perceives the basics of reality, because the basic of reality are wildly miraculous.
A few examples:
We live on a tiny planet floating in the endless void of space.
Time is an illusion made by measuring spins of the earth and laps around the sun. The past is a memory, the future a dream, and both are mental projections from the present. All is one ever-changing, eternal present moment.
A single cell organism speciated into all forms of life on Earth. All life on our planet traces appears to trace back to one source, an unbroken chain of life branching out from a single trunk. To say we are “related” to all of life on Earth may be the grandest understatement.