Remember, you don't need anything external to do Magick. The Magick is inside of you.
But, especially when you are just beginning, certain things can increase your desired effects of Magick (in very big ways) - such as colors and wicca symbols...
This is because you are able to draw on the energies added by external tools (which each are imbued with their own energies). More importantly, you draw on the added belief these tools add to your subconscious mind.
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