Quote by Courtney Carlock

Once a thing is known,it can't be UNknown.

— Chris Crutcher

For once a thing is known, it can never be unknown. It can only be forgotten.

— Anita Brookner

All that we know is nothing can be known.

— Socrates

There are known knowns and known unknowns, but what we should be worried about most is the unknown unknowns.

— Gary Marcus

“The difference between the Known and Unknown is just Knowing it.”

— Ahtesham

The unknown is always interesting.

— Michael Ovitz

There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know…

— Anonymous

Never before have we known what we know.

— Sylvia Earle

Move from the known to the unknown.

— B.K.S. Iyengar

One can never know enough. The unknown and its call lies even in what we know.

— Eduardo Chillida

There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that…

— Donald Rumsfeld

The unknown is always scary.

— Madeline Stuart