They fail to see that education cannot convey to pupils more than the knowledge of their teachers.

One of the more popular ideals of education is summarized in this quote from Malcolm Forbes:

Education's purpose is to replace an empty mind with an open one.

Hmm, probably deserves a top-level comment. Anyway, the reality is that some people are happy with imitations, while others strive for creativity:

The mark of the creative mind is that it defies a part of what it has learned or, at least, adds something new to it.

So good education is beneficial to creative types, as well, since to defy something or to add to something, you have to learn that something first.

No matter how efficient school training may be, it would only produce stagnation, orthodoxy, and rigid pedantry if there were no uncommon men pushing forward beyond the wisdom of their tutors.

A bit harsh, given that many people are at least a little bit creative.

igniting of the fire can come only from the inner qualities of the individual, incapable of being influenced from outside.

Not sure if this is Mises' opinion or what he argues against, but, again, seems a bit harsh. There are always the outliers, but for the majority of people this "igniting" is a combination of nature and nurture.