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 content to begin with doubts, he shall end in certainties.
If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
The best lack all conviction, while the worst are full of passionate intensity.
The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence.
Doubt is not a pleasant condition, but certainty is absurd.
The opposite of faith is not doubt, it’s certainty.
I think it's much more interesting to live not knowing than to have answers which might be wrong.
Believe those who seek the truth, doubt those who find it; doubt all, but do not doubt yourself.
Isn't it the moment of most profound doubt that gives birth to new certainties? Perhaps hopelessness is the very soil that nourishes human hope; perhaps one could never find sense in life without first experiencing its absurdity.
To believe with certainty, we must begin with doubting.
Modest doubt is called the beacon of the wise.
To have doubted one's own first principles is the mark of a civilized man.
Fools and fanatics are always so certain of themselves.
If I am fool, it is, at least, a doubting one; and I envy no one the certainty of his self-approved wisdom.
Not to be absolutely certain is, I think, one of the essential things in rationality.
Ignorance more frequently begets confidence than does knowledge.
One must verify or expel his doubts, and convert them into the certainty of Yes or NO.
I respect faith, but doubt is what gets you an education.
The neurotic has problems; the psychotic has solutions.
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
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.
When prayer removes distrust and doubt and enters the field of mental certainty, it becomes faith; and the universe is built on faith.
It is the dull man who is always sure, and the sure man who is always dull.
both doubt and certainty are as contagious as the common cold
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