Sari La Rue

“And then, as to the mastication of the food, the mental process answering to this is simply thinking over what we read. This is a very much greater exertion of mind than the mere passive taking in the contents of our Author. So much greater an exertion is it, that, as Coleridge says, the mind often “angrily refuses” to put itself to such trouble— so much greater, that we are far too apt to neglect it altogether, and go on pouring in fresh food on the top of the undigested masses already lying there, till the unfortunate mind is fairly swamped under the flood. But the greater the exertion the more valuable, we may be sure, is the effect. One hour of steady thinking over a subject (a solitary walk is as good an opportunity for the process as any other) is worth two or three of reading only. And just consider another effect of this thorough digestion of the books we read; I mean the arranging and “ticketing,” so to speak, of the subjects in our minds, so that we can readily refer to them when we want them.”
― Lewis Carroll, On Corpulence: Feeding the Body and Feeding the Mind