Yes, it's a pity that Sriram is using the expression 'higher self' as opposed to Atman, but it was the 'myriad of methods' you mentioned that I was more interested in, particularly if there is one which sustains the qualities mentioned so that that same pilot did not feel obliged to drop bombs on German children whilst self sacrificing to save English children.
I would say that it was obvious that people find many ways of expressing their natural qualities of Sriram's 'higher mind', e.g. through their social interaction, their culture, their natural instincts in certain situations. Some of these may be encouraged by methods of learning which might include meditation, schooling, emphasizing and praising individuals who show these qualities.
I would also remind you that I also suggested that those natural instincts also include the opposites of Sriram's 'higher mind' qualities.(see the first paragraph of post 47)
As regards your comment on the pilot, it seems to me that you are making a gross simplification of what happened. For instance, I doubt if that pilot deliberately targeted German children, but, on the other hand, it seems he did deliberately target his plane away from the English children. Also, it might be that the powers that be of that time thought that the bombings over Germany would lead to eventual German surrender which they thought was a good thing, however right/wrong we may see their actions now.
The point I am making is that Sriram's 'higher mind' is as much a part of human nature as qualities which wouldn't be included in his summation. All are part of what it is to be human(and, incidentally, can be shown to be present in a variety of other animals). It's no big deal and there is no evidence at all that there is the presence of any entity which cannot be explained by the workings of the brain.