Certainty Quotes

Most popular certainty quotes

Certainty is not a property of the universe; it is a construct of the mind.
Inquiry is fatal to certainty.
Only the madman is absolutely sure.


The only certainty is that nothing is certain.
One bird in the hand is worth two in the bush.


A reasonable probability is the only certainty.
The highest probability amounts not to certainty.
Doubt is to certainty as neurosis is to psychosis.


Anyone who takes the sure road is as good as dead.
The only thing that's certain is the final curtain.
It is wise to be sure, but otherwise to be too sure.
I am certain there is too much certainty in the world.
The minute one utters a certainty, the opposite comes to mind.
Doubt is not a pleasant condition.  But certainty is an absurd one.
A little thing in hand is worth more than a great thing in prospect.
We can be absolutely certain only about things we do not understand.
There are few things more dangerous than inbred religious certainty.
It is the certainty that they possess the truth that makes men cruel.
In this world nothing can be said to be certain, except death and taxes.

death taxes

The one unchangeable certainty is that nothing is certain or unchangeable.
I believe in evil.  It is the property of all those who are certain of truth.
One certainty we all accept is the condition of being uncertain and insecure.
Ah, what a dusty answer gets the soul
When hot for certainties in this our life!


Not to be absolutely certain is, I think, one of the essential things in rationality.
I should be foolish to release the bird I have in my hand in order to pursue another.
The scientist believes in proof without certainty, the bigot in certainty without proof.
Certitude is not the test of certainty.  We have been cocksure of many things that were not so.
I tore myself away from the safe comfort of certainties through my love for truth—and truth rewarded me.


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

clarity intellect uncertainty

Human beings are perhaps never more frightening than when they are convinced beyond doubt that they are right.
There is no such thing as absolute certainty, but there is assurance sufficient for the purposes of human life.
There is only one thing about which I am certain, and this is that there is very little about which one can be certain.
The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers.


I have lived in this world just long enough to look carefully the second time into things that I am most certain of the first time.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.


Longing for certainty and for repose . . . is in every human mind.  But certainty generally is illusion, and repose is not the destiny of man.
Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong.
It is wrong for a man to say that he is certain of the objective truth of any proposition unless he can produce evidence which logically justifies that certainty.
There are inquiries in which scanty evidence is worth using.  We may not be able to get certainty, but we can get probability, and half a loaf is better than no bread.
A maxim for the twenty-first century might well be to start not by fighting evil in the name of good, but by attacking the certainties of people who claim always to know where good and evil are to be found.

good and evil

Since we can never know anything for sure, it is simply not worth searching for certainty; but it is well worth searching for truth, and we do this chiefly by searching for mistakes, so that we have to correct them.