Illumination comes only through the death of the ego. There is no other door.
Developing chakras is easy. Many demons know how to activate chakras, albeit negatively through feeding pride, anger, lust, laziness, greed, etc.
Awakening the chakras positively as a result of dying in ourselves is tremendously difficult, but comes about through practicing retrospective meditation.
If we strive to have spiritual illumination, we must remove from our psyche the intrinsic causes of our internal spiritual darkness.
People who develop powers without destroying the ego are terrible demons.
For every step that we take in the development of our occult powers, we must take a thousand steps on the path of sanctity. -Samael Aun Weor, The Major Mysteries