Quote 1
"… 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."
There was silence in the room, except for the distant rushing of the sea.
"You talk about wands like they've got feelings," said Harry, "like they can think for themselves."
"The wand chooses the wizard," said Ollivander. (24.115-117)
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.