A bird in hand is a certainty. But a bird in the bush may sing.
Bret Harte

A liberal knows that the only certainty in this life is change but believes that the change can be directed toward a constructive end.
Henry A. Wallace

A woman's guess is much more accurate than a man's certainty.
Rudyard Kipling

Adventure upon all the tickets in the lottery, and you lose for certain; and the greater the number of your tickets the nearer your approach to this certainty.
Adam Smith

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.
Karl Von Clausewitz

And for mathematical science, he that doubts their certainty hath need of a dose of hellebore.
Joseph Glanvill

And, for an instant, she stared directly into those soft blue eyes and knew, with an instinctive mammalian certainty, that the exceedingly rich were no longer even remotely human.
William Gibson

As a painter today you have to work without that essential platform. But if one does not deceive oneself and accepts this lack of certainty, other things may come into play.
Bridget Riley

Beauty is desired in order that it may be befouled; not for its own sake, but for the joy brought by the certainty of profaning it.
Tom Stoppard

Benjamin Franklin said there were only two things certain in life: death and taxes. But I'd like to add a third certainty: trash. And while some in this room might want to discuss reducing taxes, I want to talk about reducing trash.
Ruth Ann Minner

But teleological considerations can lead no further than to a belief and a hope. They do not give certainty.
Christian Lous Lange

Certainty is the mother of quiet and repose, and uncertainty the cause of variance and contentions.
Edward Coke

Certainty? In this world nothing is certain but death and taxes.
Benjamin Franklin

Certitude is not the test of certainty. We have been cocksure of many things that were not so.
Oliver Wendell Holmes, Jr.

Could we have prevented in 100% certainty? I don't think anything is that certain. However, we would have had a very, very good chance for preventing it.
Sibel Edmonds

Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.
Bertrand Russell

Don't be too harsh to these poems until they're typed. I always think typescript lends some sort of certainty: at least, if the things are bad then, they appear to be bad with conviction.
Dylan Thomas

Doubt is not a pleasant condition, but certainty is absurd.
Voltaire

Doubt is to certainty as neurosis is to psychosis. The neurotic is in doubt and has fears about persons and things; the psychotic has convictions and makes claims about them. In short, the neurotic has problems, the psychotic has solutions.
Thomas Szasz

For any culture which is primarily concerned with meaning, the study of death - the only certainty that life holds for us - must be central, for an understanding of death is the key to liberation in life.
Stanislav Grof