User blog comment:Soulreaper1234/Urahara says Fusion Aizen says Subdue/@comment-44061-20100508055447

I don't think its all summed up in what took place in this chapter as far as the future of Urahara's attack on Aizen. But in terms of fusion vs. subdue its largely a matter of interpretation.

In Aizen's view he is all powerful and intelligent, he perceives that his knowledge is absolute especially in the context of the Hogyoku. It basically shows how big his ego is that he believes that he would have a far greater understanding of the "device" then its creator. Urahara is more humble as he has been shown. He states what is evident by calling the situation what anyone viewing it would, fusion. Note the two aren't the same Urahara states an action taking place while Aizen is saying things like evolution and subdue. His basic idea is that he can overtake the hogyoku as he does with most things, he just assumes he will overpower it, will he is the question. He also says evolution which is a questionable choice of words.

Notice Aizen basically uses all the words that define gaining a greater state of being or gaining dominance. Urahara doesn't deny the true power of the Hogyoku and he basically states that 100 years ago he hadn't mastered the Hogyoku. Now he has the device for 100 years vs. Aizen's couple of months. The concept here is that Urahara obviously knows something that he hasn't stated yet.

In my opinion Aizen maybe in more trouble then he realizes not just from what we don't know in terms of what Urahara knows but in the concept that such a thing that can bring out the hearts desire and apparently has some form of sentience can be subdued by someone the likes of Aizen. Even with his power he maybe overstepping. He may feel he has nothing to fear from high level kido or his opponents, but what is he turning into? Id probably be more concerned about the Hogyoku if I was Aizen.