It is absolutely possible to achieve a higher consciousness. Experience more, read more, hear more, see more, think more, feel more. You will be more conscious than those who can't, or more likely won't do those things.

Let's say that you walk into a grocery store with someone, and they have worked in a grocery store and you haven't. While you are shopping, they are more conscious than you are of what is going on. They are conscious of what is happening in the back and you are not. They are conscious of what the workers stocking are doing. You probably don't even see them.