Assuming Quote by Ludwig Wittgenstein

I have a theory that I did most of my observing probably before I was twenty, stored it, and am still drawing on it.

— Joyce Grenfell

I was always taught to keep things private.

— Ashlyn Harris

I didn't use to think anything was worth keeping private. Now I do.

— Christina Ricci

The moment a person forms a theory, his imagination sees in every object only the traits which favor that theory.

— Thomas Jefferson

Theory is good; but it doesn't prevent things from existing.

— Jean-Martin Charcot

Observe constantly that all things take place by change.

— Marcus Aurelius

Theory must mediate between all previous truths and certain new experiences

— William James

Even your own memory changes over time because of circumstances or even because your body changes.

— Martha Ronk

“This is why theory can be so valuable: it can explain what will happen, even before you experience it.”

— Clayton M. Christensen

You can remember it if you want by unraveling the double helix of inner knowing.

— Cherie Carter-Scott

If you want to make information stick, it's best to learn it, go away from it for a while, come back to it later,…

— Joshua Foer

You can never tell what will happen to a theory before you can get around to using it.

— Josephine Lawrence