How many people realize that Man is composed of both an inside [invisible reality] and an outside illusion appearing real?

An accounting of "realizing" people in recent decades may well include these: Paramahansa Yogananda, "Autobiography of a Yogi," Mark Prophet, "The Path of the Higher Self;" Omraam Mikhael Aivanhov, "Man, Master of His Destiny," Rev. Mary Baker Eddy, "Science and Health with Key to the Scriptures;" Meher Baba, "Beams from Meher Baba," Sri Govindananda Bharati, whose biography is given by John Bennett in "Long Pilgrimage;" Gurdjieff, e.g. "Transcripts of Gurdjieff's Meetings; "Mother Meera, "Answers;" Nicholas Roerich, " "Memoirs from the Himalayas;" Sri Ramakrishna, "The Gospel of Ramakrishna;" Swami Vivekananda, "Swami Vivekananda on Himself," Sri Yukteswar, "The Holy Science;" Lahiri Mahasaya, "Srimad Bhagavad Gita," by Yoga Niketan (a group name); Saint Pope John XXIII, "Journal of a Soul: The Autobiography of Pope John XXIII;" Saint Padre Pio, "Pray, Hope, and Don't Worry True Stories of Padre Pio," by Diane Allen; Saint Therese of Lisieux, "The Story of a Soul: The Autobiography of St. Therese of Lisieux;" Saint Therese of Neumann, "Therese Neumann: Mystic and Stigmatist;" Saint Mother Teresa, "Mother Teresa: Come Be My Light: The Private Writings of the Saint of Calcutta."

No such poll has ever been taken

I think its the other way around.

Not many

You may be the only one.

I know.

Can you pinch yourself?

Every one who has a problem of sanity.

Can you rephrase the question into a more coherent one?