Spiritual evolution occurs as the result of removing obstacles and not actually acquiring anything new. Devotion enables surrender of the mind’s vanities and cherished illusions so that it progressively becomes more free and more open to the light of Truth.
Illumination refers to those spiritual states where sufficient barriers have been dropped, either deliberately or unconsciously, so that a greater context suddenly presents itself, and in so doing, illuminates, clarifies, and reveals an expanded field of consciousness actually experienced as inner light. This is the light of awareness, the radiance of the Self that emanates as a profound lovingness.
– from The Eye of the I p. 30
Thanks