Because to confide a part of your soul to something that can think and move for itself is obviously a very risky business.
J. K. RowlingTHIRTYโZERO! TAKE THAT, YOU DIRTY, CHEATING โโ โJordan, if you canโt commentate in an unbiased way โ !โ โIโm telling it like it is, Professor!
J. K. RowlingDo youโdo you think I want toโdo you think I give aโI DON'T CARE WHAT YOU HAVE TO SAY!" Harry roared. "You will," said Dumbledore sadly. "Because you are not nearly as mad at me as you ought to be. If you are to attack me, as I know you are close to doing, I would like to have thoroughly earned it.
J. K. Rowling