Family ties.

[snow15145]

No: HPFGUIDX 117265


Kneasy:
But there's a bit you missed out:
"Voldemort put a bit of himself in me?" Harry said, thunderstruck.
"It certainly seems so."
That, combined with listing the qualities prized by Slytherin with no
indication that these weren't also passed across at the same time.
Powers are different. There's only one we know of so far 
(Parseltongue)
though DD does say that powers (plural) were transferred.

Now others may disagree, but I reckon "...a bit of Voldemort.." is not
the same thing as "Voldemort's powers." I think the former phrase
was used very deliberately.

Powers per se are not a problem, they can be used without hazard
to the recipient (so long as he can control them). But a bit of Voldy
is a different cauldron of toads; it implies much more than just being
able to cast an unusual spell or two. IMO it's what allows the link,
often at considerable distances, much further than shown between any
other pair, between Harry and Voldy. The Dark Mark calls his 
disciples;
but it doesn't affect their minds, only their arms.
Voldy can stroll round Harry's mind because he has a foothold there
already.
Part of Harry's mind *is* part of Voldy.

Snow:

I couldn't agree more that part of Voldy himself has been neatly 
tucked away inside Harry only to become active through Voldy's 
emotional state. This is however, imo, not a two-way street. Voldy 
has never found the connection that does exist so that he could use 
that part of himself he had unintentionally left behind in Harry. 
Diary/Tom had come close to the understanding of what lies within 
Harry but missed severely when he remarks that there was nothing 
about Harry that was similar to himself when he met Harry in the 
chamber, Riddle determined that there was nothing special about him. 
Then again was Riddle an accomplished legilemence at this point, I 
doubt it
he was only 16. Diary/Tom couldn't see the part of Voldemort 
that lies within Harry
and Voldemort himself since has never 
connected to the fact that any part of him is missing, except for his 
immortality factor. 
Look at it this way, if Voldemort could access Harry's thoughts why 
would it be necessary to attempt to possess Harry at the Ministry? If 
Voldemort was already aware, via the connection factor, that he could 
access Harry's thoughts `inside' of Harry there would be little need 
to possess him physically. No I don't believe it has gone to that 
extent yet. Voldemort has never realized the available access to his 
Harry self. But it is questioning why Voldemort, when he was actually 
possessing Harry at the Ministry, did not see or rather feel his own 
presence in Harry. 

Snow