Who could stand in the way of this desire? Why ?

Siddhartha believes that staying with the Brahminscould stand in the way of what he desired.... that he'd learned all there was to learn from them. amd yet he was not satisfied.... he was searching for more.

"...they had already poured the sum total of their knowledge into his waiting vessel; and the vessel was not full, his intellect was not satisfied, his soul was not at peace, his heart was not still"