There is no Frigate like a Book
If you want to get right down to it, this poem's only got one message: reading is awesome! Seriously. The poem explains the precise awesomeness of reading by comparing a book to various modes of transportation. This string of comparisons reminds us of the true joy of reading – the fact that it lets us hitch rides with all kinds of different characters and travel far and wide with them in our imaginations, without even paying a cent.