Eisen's first dream tonight of recovering one of his memories was now over. He had gained a lot of things through this, more than he had thought he could with just a single sort of memory.
While he simply felt somewhat happy about learning about the others, that was where his feelings for them stopped. He was excited about teh basic idea of finally recovering his memories again, but beyond that, the actual memories didn't cause him to feel any special way.
But it was different with the memories that he recovered just now. This time, a hole that Eisen didn't even know about was filled in. The old man felt energetic at a level that he didn't expect, ecstatic nearly. He was happy. That was all that one could call what Eisen was feeling. And in the end, it made sense as well. Nobody could blame him for feeling excited about this whole thing right now.