How does Goku keep getting stronger?

How does Goku keep getting stronger? Part of the reason Goku always gets stronger from a struggle has to do with his Saiyan heritage, which equates to whatever doesn’t kill him, only makes him stronger. Of course, some of Goku’s power is also from his hard work and obsession with getting stronger or a new technique he learns.

Part of the reason Goku always gets stronger from a struggle has to do with his Saiyan heritage, which equates to whatever doesn’t kill him, only makes him stronger. Of course, some of Goku’s power is also from his hard work and obsession with getting stronger or a new technique he learns.
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