"The bookful blockhead, ignorantly read With loads of learned lumber in his head"

This quote by Alexander Pope is a criticism of those who are book-smart however lack good sense. The phrase "bookful blockhead" indicates that the person is filled with understanding from books, however is not able to use it in a practical method. The expression "ignorantly check out" indicates that the person is unable to understand the knowledge they read, and instead is just blindly remembering realities. The expression "loads of learned lumber in his head" suggests that the person is filled with ineffective knowledge that is not relevant to reality. This quote is a criticism of those who are book-smart however do not have common sense, and it implies that understanding without useful application is worthless.