Our consciousness consumes our matrix, our reality.
My discovery of the concept of consciousness
In my opinion, the best protection is to communicate directly with the Source. If a consultant is expecting information and answers from a deceased loved one, I won't call the loved one, but will simply ask to receive the information through the Source.
Doing it this way already helps to avoid attracting playful souls or other entities in your loved one's place.
My physical experience of consciousness
Even better, if we're aware of our natural, direct connection with the divine Source of Unconditional Love- God for some - we are by nature, by essence, protected by this channel of Light.
Everything is information, and if we connect to the right radio frequencies and vibrate on these frequencies of Light, we are unreachable to what vibrates differently. It's the same principle asadjusting the frequency of a radio to receive and communicate on the desired frequency.
My awareness
If it all started with a lot of entertaining brainwashing, and dozens of books on spiritualitythe integration and experience of being in a state of consciousness took place through the body, not the head! This awareness and experience gave a major boost to my sensing, mediumship and channeling skills. And even my morphology changed, as my body no longer needed to scream its need for care and attention.
All this to say that in your encounter with the spiritual world, you shouldn't stop at intellectual knowledge, but really live in consciousness, be in your body, be in nature, just be!