This cannot be avoided.
Emphasising the wrong material, misunderstanding the significance of certain principles... inaccuracies... slowly it all crumbles to dust.
A slight error grows over time and leads to a monstrous deterioration.
Only the instructor can see the entirety of the curriculum, and see how it all fits together and operates.
A small error in principle at the beginning of training will have greater consequences as time goes on.
(Yang Jwing-Ming)