| Quote #4
"I hate it, I hate the fact that [Voldemort] can get inside me, that I have to watch him when he's most dangerous. But I'm going to use it."
Harry's finally started to act totally based on his own judgment – he realizes that nobody else's decisions or instincts are any more correct than his own, and he's wholly responsible for how he handles his connection to Voldemort, which is, after all, just between the two of them.
| Quote #5
"… Of course, the manner of taking matters. Much depends on the wand itself. In general, however, where a wand has been won, its allegiance will change."
Interesting… so, not only humans make choices here, but so do their wands. This is a fascinating twist on this theme that will prove to be fundamental to the plot's resolution. It's another way in which Harry's approach to magic differs from Voldemort's; while the latter thinks that he can force anything he wants to happen, Harry realizes that some things (like the Elder Wand choosing him) happen out of their own free will.
| Quote #6
As he followed Bill back to the others a wry thought came to him, born no doubt of the wine he had drunk. He seemed set on course to become just as reckless a godfather to Teddy Lupin as Sirius Black had been to him. (25.56)
Harry recognizes that his choices have been reckless and dangerous – and that he's following a pattern he's been taught by Sirius. However, we know that Harry's a very different man from his godfather… and, as much as we love Sirius, a wiser one overall.