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Thoughts without content are empty, intuitions without concepts are blind.

All there is to thinking is seeing something noticeable, which makes you see something you weren't noticing, which makes you see something that isn't even visible.

One of the things I learned, one of the strangest things, is how to think. There was nothing else to do. I couldn't see people, or go for a walk in the forest. All I had was my head and my books, and I thought a lot.

Have you ever wondered what your subconscious mind looks like? Well today, I can show you.

When you get old, it's hard to tell what's memory and what you've kind of created in your head as memory, you know?

I can see there's a connection between not following normal thinking and doing creative thinking. I wouldn't have had good scientific ideas if I had thought more normally.

Many think of memory as rote learning, a linear stuffing of the brain with facts, where understanding is irrelevant. When you teach it properly, with imagination and association, understanding becomes a part of it.

I do think that I'm a big believer in having an idea or having ideas and just tucking them away in the back of your brain. Even if you aren't consciously thinking of them, I think they simmer. You're working on them, even if you don't know you're working on them, and I think having something in your head for a while is a valuable thing.

I think that I cannot immediately see the route by which we should really understand memory and the workings of the brain.