Review Detail of Jade_Theif in Oh My God! Earthlings are Insane!

Very unique idea that the repressed memories of his past self have to be unlocked to gain skills that he already had in the future. The concern I have is what happens when he reaches equilibrium with his past knowledge? Even he states that he didn't get very far due to a past injury that is now resolved in this time line. Where will the new knowledge cone from once he has reached his previous peak?