this is just my opinion.
the only being that should be worshiped is god itself.
However, due to the lack of our capacity to truly understand what we are worshiping, we prey to the purest image of god, or its manifestation in our realm.
god accepts this inadequate form of worship from us, due to its kindness and grace.
god itself, is not within us or in any specific place.
however, we have the capability to access the IMAGE of god within ourselves through prayer.
this IMAGE of god is within everything, and all are striving to access and manifest it.
Well as I understand it we don't worship the 'light of God' we worship the one true God, the Creator. When it says that we're made in the image of God that basically means that the human being displays all the names and attributes of God and that's what makes us different from the animal, beast of the field. So in that sense the human being itself is a light of God.
Another thought is that it is written that we are created at the end of darkness and the beginning of light. The light is a potential in us, that must be brought forth. Thus us who are born of the human spirit, we require to connect with the source of that light (Holy Spirit) via the aid of the 'Spirit of Faith'.
I see we transend the darkness to embrace the light and only in that state can we mirror that light.
As such we know the light is not from us, all good is from God, all evil from our own self.
Selfish isn't fundamentally bad. When people realize that they are social beings, it can be selfish to cultivate good community. Freud said that we act causally, according to cause and effect. Adler said that we act according to a life plan. Basically it is not clear whether even good religious action is not selfish, because we want to satisfy our self-image as good pious people.
In human history God was worshiped very roughly in 3 forms: through prayers to a hierarchically thought God (Allah, Vishnu), through a prophet/Avatar or through dialogue with ourselves.
Many religious people pray by thinking, asking, researching within themselves. This is directed at God, whom we feel in our innermost being. However, God is not in us because he is not material. He transcends every form of matter and therefore at first sight the prayer to the inside may feel like a form of egoism, but the goal of this dialogue is never one's own ego, but God whom we think to be in the depths of our existence.