Forgiveness and Restoration
There are many themes in the novel but a major one is forgiveness. Sometimes we need to forgive others, sometimes we need to forgive ourselves and sometimes we need to ask for forgiveness.
Living with guilt is tied in to the forgiveness theme. So is bitterness. The Chair shows how one event has the power to ruin lives if one lives with one eye on the past. Let go of the guilt. Let go of the bitterness. Receive forgiveness.