Don't you stay at home of evenings? Don't you love a cushioned seat in a corner, by the fireside, with your slippers on your feet?
If you were designing the sort of information-processing system a brain is, it would be extremely impractical to store memories permanently in their original form. You need mechanisms for transforming and recording them; for chunking information into categories . Is your memory a phonograph record on which the information is stored in localized grooves to be replayed on demand? Is so, it's a very bizarre record, for the songs are different every time they're played. Human memory is more like the village storyteller; it doesn't passively store facts but weaves them into a good (coherent, plausible) story, which is recreated with each telling.
Before I put a sketch on paper, the whole idea is worked out mentally. In my mind I change the construction, make improvements, and even operate the device. Without ever having drawn a sketch I can give the measurements of all parts to workmen, and when completed all these parts will fit, just as certainly as though I had made the actual drawings. It is immaterial to me whether I run my machine in my mind or test it in my shop. The inventions I have conceived in this way have always worked. In thirty years there has not been a single exception. My first electric motor, the vacuum wireless light, my turbine engine and many other devices have all been developed in exactly this way.
My method is different. I do not rush into actual work. When I get a new idea, I start at once building it up in my imagination, and make improvements and operate the device in my mind. When I have gone so far as to embody everything in my invention, every possible improvement I can think of, and when I see no fault anywhere, I put into concrete form the final product of my brain.