At first Ryan thought that Jack was a CIA or KGB agent sent to destroy Rapture. However, right when Jack was outside Ryan's office, Ryan realizes that Jack is his son and he chooses not to hurt or attack Jack. When Jack waits outside Ryan's office, Ryan tells Jack that he was being controlled by Atlas his whole life so Jack could kill Ryan. Ryan gives Jack his golf club and commands Jack to kill him. Jack could not refuse to kill Ryan because Ryan said the phrase, "would you kindly." Ryan did this to show that he was a man and Jack was a slave, because "a man chooses, a slave obeys".