We, as beings of Light get our vital life force from Source/God/the Creator (choose your favourite word). This is the energy which animates us, which feeds us.
Negative energies on the other hand are energies who have taken a vow of separation from Source or God thus they have no energy source of their own. Because they have no energy source of their own, they draw their power from other beings (like vampires). They do this by creating negativity in beings of light, which they can then siphon off. So negative entities inspire emotions like fear, anger, hatred, jealousy, resentment. They love limiting beliefs that inspire these emotions and thoughts. Lots of yummy soul food for them.
But we need to remember that there is no ’source’ of darkness to contend with. There is no Devil. Source or God is the only energy that is. Negative energies exist wherever there is an absence of Source, or light energy. That’s why they’re called dark energies.
When you feel fear in the presence of a negative entity, that nourishes the entity and it grows and expands. It gets scarier and scarier in proportion to your fear. You’re the one who’s feeding it. If you ignore or banish any class of negative entity, it shrinks and disappears. Quite simply, they are only as powerful as you allow them to be.
The first time I stood up to a negative spirit it was so unscary it was laughable. A negative entity is a bit like a kid in a Scream mask on Halloween. Take his mask off and underneath is someone who’s just getting off on scaring people. If you don’t realize that his mask is just a mask, you may run away, screaming. You can be sure that the negative entity will run after you, to get more fear energy out of you. But if you turn back and face the entity and run after it and de-mask it, the entity will then go and find someone else to scare. Simple as that. So the best way to face your fear of the prince of darkness is to de-mask him and tell him to go and scare someone else.
There may be cases where people believe they have been harmed by negative forces. This all depends on your belief system. If you buy into your fears to such an extent that you really believe you can be harmed by negative forces, you may just let them do that. But negative forces cannot harm you without your collaboration. Even dark forces respect free will.
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...and there's going to be flutes playing and trombones and flowers and garlands of fresh herbs!