Are you using the word Illumination as in quicken?
This would be a form of revelation or witnessing to!
The Holy spirit has an endless repertor of enlightment.
15 For thus saith the high and lofty One that inhabiteth eternity, whose name is Holy; I dwell in the high and holy place, with him also that is of a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite ones.