Normally the motivation for strong defences is an increasingly powerful revulsion toward the often painful sensation of experiencing. Or it can be a realisation, the implication of which can cause the individual to manifest total shutdown. This shutdown occurs in order to prevent the emotional knowledge of the realisation from causing them pain. For example, the realisation that you have lost the potential to love yourself for the rest of your life. The impact of this realisation can be enough for one to decide to shut down the emotional facility so that the loss cannot stimulate the tremendous grief associated with such loss...