I can often feel the presence of light entities when I am meditating or connect with the divine and my higher self. And it is true that you may attract the wrong kind of energies and entities when you have a bad mindset. So it is very important to be full of light and if you feel like you can't shine, ask the divine for help and trust the universe. We are blessed, we are guided. We just need to remember and appreciate that :)
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Much love and light to you :)