Winston Churchill, who abhorred laziness in other people, himself took a nap every afternoon. He defended his afternoon doze in practical terms as an absolute necessity:
"You must sleep sometime between lunch and dinner, and no halfway measures. Take off your clothes and get into bed. That’s what I always do. Don’t think you will be doing less work because you sleep during the day. That’s a foolish notion held by people who have no imagination. You will be able to accomplish more. You get two days in one—well, at least one and a half, I’m sure. When the war started, I had to sleep during the day because that was the only way I could cope with my responsibilities."
Most people aren't trained to want to face the process of re-understanding a subject they already know. One must obtain not just literacy, but deep involvement and re-understanding.
Have you ever sat very silently, not with your attention fixed on anything, not making an effort to concentrate, but with the mind very quiet, really still?
Then you hear everything, don't you? You hear the far off noises as well as those that are nearer and those that are very close by ...
Your mind is not confined to one narrow little channel.
If you can listen in this way, listen with ease, without strain, you will find an extraordinary change taking place within you ... and in that change there is great beauty and depth of insight.