"Thick as a brick" is a phrase meaning stubbornly dumb, as one's head is so thick that no new thoughts can enter it. The song starts with Ian Anderson expressing his low expectations for his target ("I may make you feel but I can't make you think") before singing about class structures, conformity, and the rigid moralistic beliefs of the establishment that perpetuates it.
The song follows a young boy who sees two career paths: soldier and artist. He chooses the life of a soldier, just like his father. We see him assimilate into the society he once rebelled against, becoming just like his dad.
The song follows a young boy who sees two career paths: soldier and artist. He chooses the life of a soldier, just like his father. We see him assimilate into the society he once rebelled against, becoming just like his dad.