Definition of Unknown

Unknown Quotations

There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.
Donald Rumsfeld

There is not a truth existing which I fear... or would wish unknown to the whole world.
Thomas Jefferson

We stand today on the edge of a new frontier - the frontier of the 1960's - a frontier of unknown opportunities and perils - a frontier of unfulfilled hopes and threats.
John F. Kennedy

Great men, unknown to their generation, have their fame among the great who have preceded them, and all true worldly fame subsides from their high estimate beyond the stars.
Henry David Thoreau

There are things known and things unknown and in between are the doors.
Jim Morrison

What then do you call your soul? What idea have you of it? You cannot of yourselves, without revelation, admit the existence within you of anything but a power unknown to you of feeling and thinking.
Voltaire

Prepare for the unknown by studying how others in the past have coped with the unforeseeable and the unpredictable.
George S. Patton

I believe in a long, prolonged, derangement of the senses in order to obtain the unknown.
Jim Morrison

Men must be taught as if you taught them not, and things unknown proposed as things forgot.
Alexander Pope

All nature is but art unknown to thee.
Alexander Pope