Death and dying
A false bravura
Young people often have a bravura about giving up their life. In one of Bruce Lee's movies he is forced to fight Kareen Abjur Jabaar (the 7'2" basketball player) who says to him "I am not afraid to die," and later he did die. Idealism, the warrior code, principles worth dying for, sacrifice, do or die, are all codes of behavior that can lead to death. As these paradigms crack and crinkle, eventually one is left with just life and living without a rigid code of behavior. One realizes it's not about the "isms." One realizes how precious life is. One sees it more and is more willing to fight to stay alive. Life becomes a valuable entity that has to be preserved.