DEEP-VERSED IN BOOKS AND SHALLOW IN HIMSELF

Many books,
Wise men have said, are wearisome; who reads
Incessantly, and to his reading brings not
A spirit and judgement, equal or superior,
(And what he brings, what needs he elsewhere seek?)
Uncertain and unsettled still remains,
Deep-versed in books, and shallow in himself;
Crude or intoxicate, collecting toys
And trifles for choice matters, worth a sponge;
As children gathering pebbles on the shore.

J. Milton. Paradise Regained.