I need to push invasive thoughts out of my mind created by other people.

I have read multiple books by a woman named Byron Katie..she is a genius. She says our thoughts are NOT our thoughts. They stream in unaware, unconsciously, and WE are not the ones thinking them. Its so true, half my thoughts are truly of a source I do not know. Fearful ones, strange ones etc. And I used to think it was ME thinking these spiraling thoughts. It was a load off of me and YEARS of horrible anxiety ABOUT my thoughts when I realized how right she was. Nothing is personal. That is a quote by her as well. So I don't know that we can ever control thoughts but we can watch them...and let them go. They are NOT PERSONAL.