Si: One aspect was, that the overall vibe was that everything he did, went counter to any holistic, subjective sensing. Si as sensing fxn is tied to you/is internal. It perceives, and the distinction between Se vs Si is not that Se is devoid of a filter (but that filter could be Ni), but that Si strives more to build up sth. internally, subjective, impressionistic and in taking in something, it also affects you, because it is your sense of how you perceive the world and this can bleed into your decisions/how you go about your life. It deals with the subject (your perception of sth.) and when you disrupt/influence that, you influence the person who carries that sense vs. when you deal with the object, you apply something to that object and therefore you alter it (Se and buzz word ‚force‘?). This bridges over to Si ‚buzz words‘ like ‚aethetics‘ ‚comfort‘ ‚internal sense of body‘ ‚health‘ ‚homeostasis‘, for me.
Interaction in space is essentially the response of one object to another. Objects respond to other objects, creating certain sensations in each other [...] This element determines the ability to recreate previously experienced aesthetic sensations — to recreate an object that provides one with aesthetic sensations that the author chooses. These people are able to distinguish previously experienced aesthetic sensations from new ones and are able to "collect" and remember them.
Then I read an interesting thread about Si and skills. If you have an holistic inner impression of experience, then you can jump around and chime into your impressions and compare it to what is going on now . Here you can make the bridge in trying to understand how Ni vs. Si experience past or time in general, because it’s bollocks with all these buzz words and tying Ni to time. Every person experiences time, but maybe by the way how they take in, experience/time makes for interesting differences. Sometimes these differences come up extreme in people, sometimes it’s only something very very subtle. Now they always go all the way with ‚aethetics‘ (and general sometimes it‘s always the same old buzz words). But why not apply it for everything. So now let’s say you underwent a life situation and gained your impressions from it and then go through this again you can apply whatever insight/skill you gained to this new situation. So you can ‚manipulate‘ the flow of the situation with ‚past skills‘. Now I think with Si, it’s that they are chimed into the sensing world, so their skills will ‚manipulate‘ the flow in the sensing realm? Now in trying to tie this together with Ne. Ne can be the wrench thrown into Si holistic flow. It’s more dealing with the object and it’s external. It’s new, it abstract, so there might be sth. that was never there before and now you have to determine how it might affect you/how to deal, and through applying universal/holistic Si insight/wisdom/skill you can get sth. new and widen your internal world. So one perceiving fxn flows into the other.
Decisive: You could try to spin the thought further and try to make an distinction between Decisive (Se/Ni) vs. Judicious (Ne/Si). Idk.... I kind of saw Decisive as sometimes giving more of an workaholic, struggling, striving vibe (which would fit Plainview). But then you could say in this society everybody has to work. So maybe you have to cut deeper. Like striving for something doesn't necessarily has anything to do with your perceiving fxn. But then again the perceiving fxns take things in and that can affect peoples outlooks in a situation in time. This could flavour the overall vibe (hence maybe Se affecting the object, hence more this struggle with your will and the object?). To speculate around further, Decisive types chime into Ni, they want to keep the flow of their abstract holistic, individual sense of sth. intact. Like they think they have an overview or a direction they want to go. They might chime into Ni. They concern themselves with the abstraction of something and if you do that, you don‘t have to pay attention to sth. sensational. You can chime out of Sensation. In the abstraction realm you can also alter your subjective impression/perception, like the sense of time. Outside of it time is definite (clocks, days etc.) but inside your head this doesn‘t exist like that, you can completely forget about it. So they can be like arranging their time how they see fit and therefore feel more at home in keeping doing sth. forgetting all about anything else to get to their goal. The great minus of this is when you chime out too much of sensation, you don‘t reckognize bodily needs or you don‘t see what’s going around and don‘t take in new experience.
With Si and ‚skills‘. Your internal holistic sensing world can be all encompassing. You can go back in your mind and experiencing sth. again (makes me think of Swanns way and Madelines). With comparing and going back, or with wanting to keep it ‚harmonious‘ in the sense of holistic, you can go and let everything come back and with that you can enrichen and deepen your internal experience. But this takes time in the ‚real world‘ and you move away from being in time. So I belive when you are chimed into this mindset you can deepen your skill/your insight/your experience of the world and if sth. new comes up or you reckognize sth. old coming again you can apply your skill. But the ‚waiting,going through things again‘ takes time in the real world. The great minus is when you always stay in this. You might again not take in new experience not gain sth. new and just ruminate around with the skills/epxerience you already have (I know this is again going down the road, that Si is past and stuff and that Si users critisize, idk... it's probably better explained in that thread). Maybe that’s why ESTJ buzz words are more like ‚pragmatic‘ ‚down to earth‘ and the Hidden Agenda is Ne, so that they have this desire to apply skills to new things to enrichen their perceptiom, so that they don't stagnate and don’t stay where they are, so you can see how both things work in Si/Ne users. Ni is the Polr, because when you are immersed in an sensational holistic flow, idk you are not chimed into an abstract flow.
Note: this is all not complete, just some ruminations, because for example how is it with Ne and time? I believe they can chime out too, but then I belive them to be still more in time and more ‚improvising‘, maybe drawing from their Si in the sense of skills and master the situation that way, like when a new problem they conern themselves comes up. Ni draws from Se in the sense of like immersing themselves into the Sensing world and taking it at face value, so then we may be back at the the distinction that Se bleeds into Ni and Si into Ne. (also disclaimer, I think I'm not that god with explaining Si in this natural, maybe organic way, I always had problems to really got to the core, this is the best I could manage for know, and after having read it through, yes I know it's still probably not very good and idk... like tying Si to much with past or sth...)