There is one sense in which our consciousness, say of our surroundings, can vary continuously: the content of the consciousness can vary pretty much continuously in terms of the level of detail and discrimination. After waking up, I come to be aware more determinately of what is around me, after all. This is an uninteresting (from the point of view of my present interest) form of continuous variation of consciousness. The interesting form of continuous variation would be where the content is fixed, but somehow the degree of consciousness varies. It is hard to imagine what fixed-content variation in the level of consciousness would be like. I would be aware of exactly the same detail, but differently. More vibrantly? More focusedly or more concentratedly? Focus and concentration are a promising start. But it seems to me that less or concentrated focused consciousness does at least tend to have a lower level of detail of content. When I concentrate on a part of the visual field, I see more detail there.