he confusion or inability to grasp or learn comes AFTER a word that the person
did not have defined and understood.
It may not only be the new and unusual words that you will have to look up. Some
commonly used words can often be misdefined and so cause confusion.
This datum about not going past an undefined word is the most important fact in the
whole subject of study. Every subject you have taken up and abandoned had its words which
you failed to get defined.
A person often starts study of
a new subject with great eagerness.
However, if he accumulates
his interest wanes.
If he does not find these
and get them defined,
he will lose interest entirely
and abandon the subject.
This is called a blow.