Harmonious mind means harmonious society. Harmonic motion means cycles per second. That means mind harmony means consistency(against adverse questions) for mind(legality between one of two by three for four). That means harmonious mind is neither written word/s nor spoken word/s "but consistent between written sense and spoken sense)". It is not enough to by-heart written sense and/or spoken sense to speak and/or write back for examination. It is to read/listen "with consistency of self against adverse questions of other/s" to write back as self for other/s in pass examination. So STUDENTS ! Indian students need not be obedient to teacher/s in classroom whereas they need be obedient in public WHEREAS American students need be obedient in classroom while they need not be obedient in public". That is philosophical difference between Indian student and American student,

THIS IS VERY IMPORTANT CHAPTER OF PHYSICS(SPIRITUALISM).