WHAT, IN, THE, ACTUAL, FUCK?
Surprisingly Complex: M.S.S.S 25
There was so much stuff here. And the ending is the worst (best) cliffhanger in a long time.
First off, we never got to know what was in the closet, and I think it's a good thing. Of course, there was something there, and you can know what was there (It will be told in the next episode probably), but for now at least, all we know is that it's something that Kaiki looks at with disgust. But even if I never get to know what it is, I'd be content, but would probably get the information just in case.
So... Kaiki vs Hanekawa, the battle of the minds, or more like conversation. Hanekawa also again talks with her cunning undertones (referenced from my last post) and almost gets the information she wants. But, that's just theorem.
The real meat comes from Hanekawa's analysis of Nadeko being so deep in the pool that is her self that she cannot see other people anymore, only reflections of her own self as other people. "No matter what is said, their words will not reach them", you should have heeded those words, Kaiki! It's not that she couldn't be deceived, but that she wouldn't want to believe in the deceit. She would deny the deceit wholeheartedly, and probably go on a rampage. She didn't want to kill Araragi and co., she just concluded that she wanted, in her own insanity. It wasn't about killing them, it was about her own deceit of herself of killing them. Sounds like a tangent, but it was like her love towards Araragi, she clung onto it not because she loved him, but because she concluded that way. Not by introspection, but by pure delusion of a world she thinks she wants.
Chronologically, the next step is Senjougahara admitting that Kaiki never lied to her. Where does such a frivolous idea come from? Ironically, from the truth. It's just the use of right words. It's true that Kaiki never lied to her, but it is true that he deceived her. If for example, she was pleading if Kaiki could help her, he would say yes. BUT, the point is not if he can, but if he will. It's not the things he says, but the things he doesn't say.
Then we enter the world of theorem and hypotheses. It is revealed that Kaiki has done things before to benefit Senjougahara that were of little or no gain to him at all. He wiped out the cult Senjougahara's mother was involved in, he had driven Senjougahara's parents to a point of a divorce because Senjougahara would have no future otherwise. Who is a good guy, who is a bad guy? That question is a ruse. No person is good or evil, people just do things that are perceived either selfish or altruistic, and they do them of their own reasons. Kaiki believes this, and thus justifies everything he does solely on the fact that it is to his interest, no matter the real reason behind it.
The real abstraction comes from the fact that last time he tried to help someone, it was an enormous failure, granting him next to no money, and the subject to be "saved" was too weak to accept the rescue. Maybe it's just some kind of karma, that Kaiki cannot save people. It is not touched here, but I think that all this has something to do with Kanbaru's mother. But it's not brought up because Yotsugi either didn't exist back then or doesn't want to offend Kaiki.
This leads to an interesting part about Kaiki's conscience. Maybe he failed to actually help Senjougahara, even though he tried, and that led to him making a compromise of driving her parents to divorce because it was the only way to let her have a future. Something similar may have happened with Kanbaru's mother. It's a possibility. What if he actually blames himself for a lot of things, he just never shows it? He has motivations beyond money, that much is known. But does it come from actual altruistic intent, or from just paying back something that he regrets? It is surprisingly hard to actually answer that.
So, with all this in mind... When Kaiki goes and executes the plan, he seems to be deliberately helping someone, which has been proven to cause failure in the past. He seems to regret those failures, and that's why he wants to set things straight. Sadly, it seems that the plan has gone awry. Kaiki really isn't very good at helping people...
Kaiki has more to redeem than meets the eye...