New lines of association are, as it were, opened up or new
points of view indicated which would not have occurred to the
person if left to himself, but which occur unwittingly and seem
luminously clear when the initial impulse is given by another
person. In this case the ideas aroused in the subject's mind
are, of course, his own, and he is exerting his own mental 180
activity though he would not have done so but for the sugges
tions given by the teacher.