Men always talk about the most important things to perfect strangers. In the perfect stranger we perceive man himself; the image of a God is not disguised by resemblances to an uncle or doubts of wisdom of a mustache.

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If you must tell me your opinions, tell me what you believe in. I have plenty of doubts of my own.

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Jealousy is bred in doubts. When those doubts change into certainties, then the passion either ceases or turns absolute madness.

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He who knows nothing doubts nothing.

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The only limit to our realization of tomorrow will be our doubts of today.

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The only limit to our realization of tomorrow will be our doubts of today. Let us move forward with strong and active faith.

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The suspicious mind believes more than it doubts. It believes in a formidable and ineradicable evil lurking in every person.

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A sound American is simply one who has put out of his mind all doubts and questionings, and who accepts instantly, and as incontrovertible gospel, the whole body of official doctrine of his day, whatever it may be and no matter how often it may change. The instant he challenges it, no matter how timorously and academically, he ceases by that much to be a loyal and creditable citizen of the republic.

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The common dogma of fundamentalists is fear of modern knowledge, inability to cope with the fast change in a scientific-technological society, and the real breakdown in apparent moral order in recent years.... That is why hate is the major fuel, fear is the cement of the movement, and superstitious ignorance is the best defence against the dangerous new knowledge. ... When you bring up arguments that cast serious doubts on their cherished beliefs you are not simply making a rhetorical point, you are threatening their whole Universe and their immortality. That provokes anger and quite frequently violence. ... Unfortunately you cannot reason with them and you even risk violence in confronting them. Their numbers will decline only when society stabilizes, and adapts to modernity.

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Time advances: facts accumulate; doubts arise. Faint glimpses of truth begin to appear, and shine more and more unto the perfect day. The highest intellects, like the tops of mountains, are the first to catch and to reflect the dawn. They are bright, while the level below is still in darkness. But soon the light, which at first illuminated only the loftiest eminences, descends on the plain, and penetrates to the deepest valley. First come hints, then fragments of systems, then defective systems, then complete and harmonious systems. The sound opinion, held for a time by one bold speculator, becomes the opinion of a small minority, of a strong minority, of a majority of mankind. Thus, the great progress goes on.

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The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.

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The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards -- and even then I have my doubts.

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He who sleeps here, when dying, mistaking the approach of death for the return of health, whispered with his latest breath, I am better now. Let us believe, in spite of doubts and dogmas, of fears and tears, that these dear words are true of all the countless dead. The record of a generous life runs like a vine around the memory of our dead, and every sweet, unselfish act is now a perfumed flower.

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I am a thing that thinks, that is to say, a thing that doubts, affrims, denies, understands a few things, is ignorant of many things, wills, refrains from willing, and also imagines and senses

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Prohibit the taking of omens, and do away with superstitious doubts. Then, until death itself comes, no calamity need be feared.

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A weak man has doubts before a decision, a strong man has them afterwards.

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Our achievements speak for themselves. What we have to keep track of are our failures, discouragements and doubts. We tend to forget the past difficulties, the many false starts, and the painful groping. We see our past achievements as the end results of a clean forward thrust, and our present difficulties as signs of decline and decay.

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All my life, I have had doubts about who I am, where I belong. Now I'm like the arrow that springs from the bow. No hesitation, no doubts. The path is clear.

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A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms agains himself. He makes his failure certain by himself being the first person to be convinced of it.

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There is a kind of courtesy in skepticism. It would be an offense against polite conventions to press our doubts too far.

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He that knows nothing, doubts nothing.

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Fidelity to commitment in the face of doubts and fears is a very spiritual thing.

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Friendship is the allay of our sorrows, the ease of our passions, the discharge of our oppressions, the sanctuary to our calamities, the counselor of our doubts, the clarity of our minds.

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He that knows nothing doubts nothing.

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James 3:17:
But the wisdom that comes from heaven is first of all pure; then peace-loving, considerate, submissive, full of mercy and good fruit, impartial and sincere.
(NIV)
But the wisdom from above is first of all pure (undefiled); then it is peace-loving, courteous (considerate, gentle). [It is willing to] yield to reason, full of compassion and good fruits; it is wholehearted and straightforward, impartial and unfeigned (free from doubts, wavering, and insincerity).
(AMP)
But the wisdom that is from above is first pure, then peaceable, gentle, and easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy.
(KJV)

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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.

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Doubts raced through my mind as I considered the feasibility of enforcing a law which the majority of honest citizens didn't seem to want.

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[Regarding tamoxifen, an anti-cancer drug] 'Experimentally, tamoxifen has carcinogenic potential. In some strains of rat, but not mouse or hamster, tamoxifen can cause liver cancers at doses as low as 5mg/kg per day... However, there are doubts about the correlation of [the results] with the risk of malignant disease even in rats, let alone in other rodents, mammals, or human beings. There are many uncertainties in extrapolating these experimental data from rats to women. The effect depends on bioavailability, hepatic [liver] blood flow, and hepatic [liver] metabolism to active genotoxic carcinogens, all of which differ enormously between rat and man.

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Our doubts are traitors, And make us lose the good we oft might win By fearing to attempt.

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An intellectual is going to have doubts, for example, about a fundamentalist religious doctrine that admits no doubt, about an imposed political system that allows no doubt, about a perfect aesthetic that has no room for doubt.

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