The answer is: Authority conflict pathway
People who undergone Authority conflict pathway tend to be really stubborn toward the people who they perceive to have enough power to restrict their freedom.
if the 'authority' do not handle the situation properly, the stubborn behavior could develop into open deviance where those people now rebelling just for the sake of it, without any clear purpose. (just like Paul).
Almost every individuals undergone this pathway at a certain point in our life. But for most people, they experienced between the age of 12 - 17 (adolescent period).