Those who have attempted to challenge the mountain have always been confident in their abilities. They all understand the consequences of failure, yet they still choose to try, which shows their confidence, right? However, nine out of ten challengers end up dead. They often have some sort of encounter or opportunity and believe that since they have reached the peak of the black-clad disciples and are on the verge of becoming an outer Clan member, why not make a bold move and enter the ranks of the top one hundred disciples of the Golden List?
Ambitious people are often blinded by their own strength. They try and end up battered and bruised. In the eyes of many, Aizen is just another person about to crash and burn.