The Incredible...

Just like Dr. Bruce can't control turning into Hulk or staying human, Siddhartha couldn't control being ordinary or finding his path. None of them can fully understand themselves since they can't control themselves  yet.
During his reflection by the river, Siddhartha says maybe he had to go through those misguided teachings so he could understand why those wouldn't guide him to his path. He has not been able to find his path and following his pattern of indecisiveness, he is most likely going to give up on the rower life with his friend the ferryman. Each time he thinks he is finally gaining control of his path he fails, like Bruce fails to control Hulk to make his random entrance.
Siddhartha might not lose himself into aggresiveness like our green "hero", but he finds himself extremely confused, like I explained with Gotye on my last entry, instead.There something bigger for him out there away from everyone else's teaching and that's why he is going back. He is going back to the start of his complicated labyrinth to draw himself into the paths he didn't take before. Siddhartha might mess up again, but he knows there's a way out of that maze, far from his confused and indecisive Hulk.