Tom realized he did not understand ,one of the many things his new Cancer and Treatments have given him . So he looked up the word Pain - Pain is a subjective, unpleasant sensory and emotional experience associated with, or resembling, actual or potential tissue damage, influenced by biological, psychological, and social factors . It acts as a protective, vital warning system, ranging from sharp/acute (short-term) to chronic (long-lasting ) . His CA has given him all that , Pain . Some pain he accepts and welcomes , he knows he continues to live . Some pain has made him more sensitive. Some pain has made him more blunt. All pain has changed him .