This poem is written to describe the situation where people are told to know their rights but are not allowed to live those rights. They are encouraged and discouraged at the same time, actually it depends whether the thing is on their favour or not. People are given an imaginary feeling of having power but in reality they have become powerless.
The poet wishes that he leads a dual life: that of the human as also that of a lizard. As lizard he wishes that he has the opportunity of hearing his enemies conspire against him. And also he wishes that he has the opportunity of playfully frightening his friends and, thereby, deriving excitement out of it.