To truly know yourself you must do the dialog and use the tools so you can decipher who you are and who you are not. Then you will know God.

Dr. Harville and Helen Hendrix have books, seminars and workbooks to help you learn a dialog you do with your Imago that helps you heal your programming. Once you see what is and has always been your programming you find who you truly are.

I also recommend getting books on how shame, blame and feeling inadequate run your life and you don't even know it as it's been hidden to you by you. If there is a devil it is the lies we keep living in. But there is a way to escape it.