you are ignorant to what is. no one is 'giving' power to geometric designs. the power is in the nature the designs reflect. Some have this wisdom, some mock it or deny it.
And in regrad to sigils, picrel.
You are separating out what you like, when the science is all one thing. Life in plants and animals is energized and animated by the microlife within it, which you are calling 'demons'. You so confidently project your ignorance on the subject to those who KNOW the practices. Kek! thank you for the laugh medicine. It is best.