Some people talk about things, but what they talk about is secondary — merely an opportunity to speak. The object of the speech remains in the old light, while the speaker is illuminated by his manner of speech and choice of words.
Other people talk about things and concentrate on them entirely. The object of the speech is illuminated in a new, revealing light, but nonetheless the speaker is also known, but differently — as illumination.
Other strange hybrids illuminate their object in revealing light, but their object of choice is themselves, and there are still others who pose as illumination.