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.
Francis BaconMots clés life advice certainty
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In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.
Bertrand RussellMots clés certainty questioning perspective presumption
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...but in this world nothing can be said to be certain, except death and taxes.
Benjamin FranklinMots clés certainty taxes 1789
I like the scientific spirit—the holding off, the being sure but not too sure, the willingness to surrender ideas when the evidence is against them: this is ultimately fine—it always keeps the way beyond open—always gives life, thought, affection, the whole man, a chance to try over again after a mistake—after a wrong guess.
Walt WhitmanMots clés science life certainty doubt thought mistake ideas affection skepticism scientific evidence humble guess surrender
Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science.
Charles DarwinMots clés science certainty knowledge willful-ignorance ignorance open-mindedness
A woman's guess is much more accurate than a man's certainty.
Rudyard KiplingMots clés certainty gender men women accuracy guesses
I believe in intuitions and inspirations...I sometimes FEEL that I am right. I do not KNOW that I am.
Albert EinsteinMots clés certainty faith intuition
The human spirit glows from that small inner light of doubt whether we are right, while those who believe with certainty that they possess the right are dark inside and darken the world outside with cruelty, pain, and injustice.
Saul D. AlinskyIn our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.
David HumeMots clés wisdom science certainty doubt reason belief facts skepticism reasoning evidence proportion assurance degrees
To voice doubts was unthinkable, but that did not means that doubts did not exist.
John ChristopherMots clés certainty
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