A woman's guess is much more accurate than a man's certainty.
Ah, what a dusty answer gets the soul when hot for certainties in this our life!
Certainties are arrived at only on foot.
Certainty? In this world nothing is certain but death and taxes.
Convictions are more dangerous enemies of truth than lies.
Doubt is not a pleasant mental state, but certainty is a ridiculous one.
Education is the path from cocky ignorance to miserable uncertainty.
He who is certain he knows the ending of things when he is only beginning them is either extremely wise or extremely foolish; no matter which is true, he is certainly an unhappy man, for he has put a knife in the heart of wonder.
I am certain of nothing but the holiness of the heart's affections, and the truth of imagination.
I have lived in this world just long enough to look carefully the second time into things that I am the most certain of the first time.
I tore myself away from the safe comfort of certainties through my love for truth; and truth rewarded me.
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.
If we begin with certainties, we shall end in doubts; but if we begin with doubts, and are patient in them, we shall end in certainties.
If you do know that here is one hand, we'll grant you all the rest.
If you have a choice between certainty and hope, choose certainty every time.
In these matters the only certainty is that there is nothing certain.
In this world nothing can be said to be certain, except death and taxes.
Inquiry is fatal to certainty.
It is the dull man who is always sure, and the sure man who is always dull.
One must verify or expel his doubts, and convert them into the certainty of Yes or NO.