The Essays of Arthur Schopenhauer; Studies in Pessimism

Instead of developing the child's own faculties of discernment, and teaching it to judge and think for itself, the teacher uses all his energies to stuff its head full of the ready-made thoughts of other people.

So it is that education perverts the mind.

Men need some kind of external activity, because they are inactive within. Contrarily, if they are active within, they do not care to be dragged out of themselves; it disturbs and impedes their thoughts in a way that is often most ruinous to them.