Dickens's poem

Her poem sounds somewhat sadistic in tone when read aloud. She sounds assertive in getting her point across about how to tell the truth, but not so much the full truth as she implies.
When I said it sounds sadistic it gives well with the poem and the meaning not only because of the way she wants to get her point across, but the meaning of telling the truth with a small lie must be told in the way the poem is written. When you want to make a point you have to be assertive and somewhat cold as her poem sounds, as when you tell a lie you must make it cold and not easily visible