How we cite our quotes: (Part.Chapter.Paragraph)
Quote #4
The choice was his, a measure of his power. No matter what the approach, the act always left him in possession of a fresh supply of material, which he could then explore at will. (3.5.4-5)
Holmes is a doctor after all, and during this time, doctors learned all about the wonders of the human body by studying cadavers. But seriously, buddy: there are other ways to go about getting cadavers.
Quote #5
The possession he craved was a transient thing, like the scent of a fresh-cut hyacinth. Once it was gone, only another acquisition could restore it. (3.5.6)
Welcome to the mind of a killer. At the time, people didn't know much about psychopaths—Holmes was one of the first known serial killers.
Quote #6
The search delighted Holmes. It satisfied his profound need for attention and gave him a sense of power over the detective. He knew that Geyer's search would be in vain. (4.2.2)
"Power" is a key word when it comes to Holmes. He desires power more than anything else…which is what leads him to kill.