Angelo's Stand ability was brought forth by the mysterious bow and arrow, and apparently they're also connected to DIO. After defeating Angelo, Jotaro thought that the danger had left the city, and tries to find the whereabouts of the bow and arrow. A few days later, Koichi is walking home with Josuke, and they pass a house that should be empty...
That means you've got the aptitude. 
If you didn't, you'd be dead.
هذا يعني أنّك تملك المؤهلات، لو لم تكن كذلك
لكنتَ في عِداد الموتى
Du hast Potenzial.
Sonst wärst du jetzt tot.
Significa que tienes lo necesario.
De lo contrario, habrías muerto.
Significa que tienes lo necesario.
De lo contrario, habrías muerto.
Tu possèdes le don.
Tu hai le qualità giuste.
Se così non fosse stato, saresti morto.
Isso mostra que você está apto.
Se não estivesse, já teria morrido.