[Albus Dumbledore and Gellert Grindelwald] took to each other immediately, and together they dreamed of a world ruled by wizards over Muggles by uniting the legendary Deathly Hallows. They believed that if they were forced to destroy a few along the way, it would still be "for the greater good", and the sufferings and losses would be rewarded a hundredfold in the end. This scenario would never happen, though. A discussion between Albus, Aberforth, and Grindelwald led to a duel that resulted in Ariana's death. For the rest of his life, Albus felt guilty, never certain whether it was his own curse or another's that had killed his sister. Grindelwald stormed back to Bagshot's home and departed to begin his own rule, leaving the country hours later. As a result of his mistakes, Albus felt that he was not to be trusted with power and, because of this, never took the position of Minister for Magic, despite being offered it several times.