At the time, the line was "correct" though.Bussani wrote:Well, Kuririn's line about needing a pure heart to go Super Saiyan is from the manga, at least.hleV wrote:Fix'd.Rocketman wrote:Like TOEI knows anything about Super Saiyans or Spirit Bombs.
Kuririn: "Doesn't one need to have a pure heart to achieve the Super Saiya-jin?"
Vegeta: "I did. A pure evil heart!"
Remember Goku's line about him having a pure heart when he fought Freeza.
So the conception of the matter was erroneous for all the involved parts.
They would later just accept that enough rage and training was enough (in other words Toriyama removed everything that made the transformation special and made it something "normal").