The same idea as this adage is echoed in the vernacular proverb which says that empty vessels make the most noise. Knowledge is desirable and should be attained at any cost, but a little knowledge though certainly better than no knowledge, has the dangerous tendency of turning the head of its owner. It is not mere a case of something better than nothing.
There is certainly a great deal of truth in the statement. It is quite common to see persons with shallow attainments parading knowledge and trying to make others believe that they are really learned. This leads them to treat others with scanty respect and look down upon those of lesser attainments. They want that others should respect and admire them and if those are not forthcoming, then get disappointed and sullen. All this finally makes them unpopular.
This tendency to parade a little knowledge is noticeable to a greater extent in women and persons of the below average classes. Having been so long unacquainted with learning and education as such, they are flushed by their first contact with them, and immediately their heads go swollen. They assume airs and think it beneath their dignity to pursue their former occupations.
Vocabulary
Shallow—hollow
Forthcoming—about to happen