Yeah definitely,
mentally repeating a mantra. Every thought that come up I just let it be and keep focusing on the mantra. Every time I catch myself focusing on the thoughts I gently put my attention again on the mantra.
that's essentially what I do in all my waking hours. But I also know of and experienced infiltration of a foreign personality entering. Also, what like you said we are not; thoughts, the ego. That's something I definitely grasp. I guess I unknowingly rely on meditating daily