Discovery requires courage and acceptance that we are not in control, and that the future is uncertain..

There is a stark difference between fear and uncertainty, Sarai. You fear nothing but are uncertain of everything..

Human history is in truth nothing but the history of the slow, uncertain, and surprising fulfillment of the Promise..

The more uncertain I have felt about myself, the more there has grown up in me a feeling of kinship with all things..

It is... easy to be certain. One has only to be sufficiently vague..

What is uncertain is how much further the bubble can expand, and what might pop it..

Many intelligence reports in war are contradictory; even more are false, and most are uncertain..

The only thing we can really count on in this uncertain world is human unreliability itself..

Let the future remain uncertain, for that is the canvas to receive our desires..

I think what's known about neurology is still scattered and uncertain.

She was "a woman of uncertain age..

Science is uncertain..

Creative Endeavors are by their nature uncertain..

The poets whom I knew then were all men and all seemed dauntingly sure of themselves - although I am sure that really they were as uncertain as I was..

Although it is uncertain, it is necessary to make science useful. Science is only useful if it tells you about some experiment that has not been done….

Nothing is so uncertain or unpredictable as the feelings of a crowd..

Of all the uncertain things marriage is the uncertainest..

In my life, the only certainty is to be uncertain. I'm an unbeliever who believes in skepticism. I'm only sure about being unsure..

Any humane and reasonable person must conclude that if the ends, however desireable, are uncertain and the means are horrible and certain, these mean….

I was deeply uncertain of who I was and who I wanted to be. I really thought I wanted to be a much cooler guy than what I was..

…a lady of what is commonly called an uncertain temper --a phrase which being interpreted signifies a temper tolerably certain to make everybody more….