In order to fully control the "secret", God gave Aizen three choices.
Aizen's strength will be doubled every time he chooses it. However, if Aizen does not unlock the "secret" after three choices, his soul will be knocked into the abyss, suffering and tortured, and wandering forever.
(Purely a work of art. If any readers are unintentionally blinded by thunder, please go to the upper right corner)