Thought: The book as a souvenir for ideas

I really liked this thought I recently discovered on Seth Godin's blog:

A book is a physical souvenir, a concrete instantiation of your ideas in a physical object, something that gives your ideas substance and allows them to travel.

 as it seems to provide a reason for physical books still existing in a world where ideas travel at the speed of light, are chewed over by millions wanting a quick burst of dopamine and then quickly spat out in favour of a newer one.