In the August Burns Red song Composure what do they mean by more and your demeanor looks like quicksand?

In the August Burns Red song "Composure," the phrase "more and your demeanor looks like quicksand" means that the person's demeanor is constantly shifting and changing, making them difficult to read or understand. This can be a metaphor for someone who is untrustworthy or unreliable, or it could simply be a description of someone who is very emotional and unpredictable.