What are the motifs in Presumed Innocent by Scott Turow?

Keeping secrets are recurring ideas in the narrative. Secrets are a stock in trade among this society of lawyers. Even so, the keeping of a secret is always a moral choice and not just a strategic one. Often in this novel, secrets are kept for the wrong reasons, although in some cases it is hard for the reader to decide if the keeping of a secret was right or wrong. The first secret of which the reader is aware is that Rusty had an affair with Carolyn. This secret, which proves to be vital to Rusty's defense in the murder trail, is echoed by the ones kept by both Horgan and Lyttle of affairs they also had with Carolyn.