What are the motifs in A Planet Called Treason by Orson Scott Card?

The motif of deception appears throughout this novel. Mueller is a violent country, but the people pretend that they are kind and gentle. The Nkumai are all about deception. They keep insisting that they are peaceful and fair and would never do anything dishonest such as lie or take bribes, but as Lanik progresses through the society, all he encounters is dishonesty, bribery and deception. Lanik learns that people often say one thing but do much another.