Dave's ESL Cafe's Student Discussion Forums

[jasonlulu_2000]

Other qualities of a good student include self-discipline and an open and critical mind. However much one knows, one must realize there�s a lot more to learn and that some of what one �knows� may turn out to be wrong. Knowing lots of things is good, but knowing the limitations of one�s knowledge is more important. Many of the classic errors of history were made by people over-confidently going beyond what they knew and understood.
Work to be educated, not merely trained.

What does the underlined sentence mean?

Thanks

[pugachevV]

I take this to mean that if you are educated in a subject you know it thoroughly. If you are trained, in a subject you know enough to use it properly but the standard is lower.
So the implication is that the word, "educated" denotes a higher level of accomplishment than the word, "trained".
I don't think this is necessarily true in modern English usage, but that's what it says in your example.