Sorry, but I don't understand this sentence. Who is doing the stressing and conditioning, and who is being stressed and conditioned in this example?
Well that is the question isnt it? The discussion around this illustrates the moral minefield which psychology represents.
There are five different stress related processes identified in that sentence which are addressed by Sargant in his book. Some are coercive and some are voluntary. He discusses how stress can be used as a weapon or as a tool.
Stress responses can involve strong memories of events associated with stressful experiences so stress can be used to condition people as in the case of coercive political indoctrination by totalitarian regimes of prisoners, such as the Uighur in detention in China today.
In the case of religion he discussed how people undergo voluntary or self initiated religious practices relating to conversion or transformation or reconditioning to follow a desirable precept such as repenting of their sins or changing their personality to become more peaceful by means such as fasting or social confrontation but there have also been forms of self torture practiced by ascetic sects in the past but (while respecting freedom to worship etc) these tend to be regarded as not particularly healthy or safe these days.
More pronounced stress responses identified in the book include collapsing into unconsciousness and a reversal or breaking of previous behaviour and personality and conditioning. Sargant argues this has had a place in trying to break battlefield conditioning in shellshock cases as a medical treatment. Stress induction as a medical treatment can include deliberately stressing or exciting the patient by invoking anger or discussing early sexual experiences, administering psychoactive drugs like methedrine (methamphetimine) or physical insult like electroshock therapy, so that is doctors acting on patients with the alleged intention of assisting their patients. It does involve a degree of detachment and cruelty which one finds a little disquieting but so does surgery, so morally it is about outcomes, can it help? In a few severe cases he suggests it can.
The same knowledge about stress reactions and stress induction techniques can be used by torturers to break the resistance of captives to interrogate them or to break their enmity e.g. the waterboarding torture scandal and concerns over Guantanamo etc.
Does that make sense ?
This is a problem, the science around human and animal behaviour is abused so readily. Trying to add to its potential for controlling others would pose the same moral difficulty as discovering atomic power, sooner or later someone was going to invent the atom bomb. The question is, is it worth it? Why would you do it, vanity? Is the human race ready for the truth about itself. I dont think so. Any knowledge we add to psychological theory might be used by doctors benignly but will also be used by totalitarian regimes and advertising executives and giant social media tech companies to exert their will over others. Its the same old problem of the Orwellian jackboot in the face of humanity. One does not want to give them bigger jackboots but one does want to level the playing field so one has to educate oneself to understand the techniques they already use against innocents like us. I am in no way condoning the deliberate use of this kind of knowledge, but it is out there already and people use and abuse psychological power already, its best the rest of us know about it. Stay safe.