Phantoms.

Thoughts are just phantoms, substance of no reality per se, until you give them a reality by paying attention to them.  Your attention is what feeds a thought.

If thoughts appear: “I am worthless.”  “I am genetically doomed.”  “I am this and that.”  And you feed them, you give these thoughts energy and expansion; then, obviously, you give them the capacity to create strong feelings.

When strong feelings are created then you create reality, and so you become whatever you have mentally fed.  You are what you constantly think about and to what you give your attention.

Demonic possessions and all fears, inferiority and worthlessness, shame and psychological trauma, loneliness–these only exist if you feed them, as these are the absurd realities you create for yourself.

Thoughts appear, they come and go; and so, without your attention they have no power over you.  So, you must be patient, let them pass, let them go and do not attach yourself to them.

And you do this by guiding or putting your attention on something else, like better habits, creative endeavors, healthier goals, and things which give you joy and create better thoughts and feelings in you.