Noted Physicist Richard Fenyman once said this about knowing the truth ..."We never are definitely right, we can only be sure we are wrong."
How then would you apply this logic to discovering the TRUTH about yourself?
In the Brihandaranyaka Upanishad (written some 3,000 years ago), Yajnavalkya is questioned by his students to describe God. His response is very similar to Mr. Fenyman's in that he says "The Divine is not this, it is not that" - (Neti, neti)
If I am to find the deepest Truth about myself then I must identify, remove and discard what I am not. I am not my thoughts, my mind, my body, my job, my car, my story, the name on my driver's license, my imperfections, my talents, my desires or my fears. Neti, neti. Not this, not that!
What's left? Start asking yourself what you're not and see for yourself.