"I don't think Si is about "feeling good" persay, or necessarily about aesthetics, good food, being healthy, etc. I think that misses the point and is not the fundamental nature of the function. I realize this isn't Socionics canon, but in my view, Si is more about vying to achieve stability and constancy in one's environment as a means to maintain the homeostasis of one's inner state. Si creates a sense of immergence with one's physical environment, both inside and outside of the body. This is apparent if you read into the information element composition of Si: EFD - Dynamic External Field. Dynamic refers to perception of changes, External refers to what is physical/tangible/apparent, Field refers to the observer being one with the observed. So what happens here with Si, is that one's self blends seamlessly with the physical environment, and can be treated as one indivisable unit. The desire to maintain a fluid coherence between the self and the environment is the overriding "goal" of Si. Disturbances in the parameters between self and environment are constantly monitored for.
Fluctuations which produce decoherence between the two and disrupt that seamless flow are considered undesirable from the standpoint of Si." https://forum.socionix.com/topic/736...out-socionics/