Quotes About Evidence

Some things are believed because people feel as if they must be true, and in such cases an immense weight of evi­dence is necessary to dispel the belief.

The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice. ... So long as men are not trained to withhold judgment in the absence of evidence, they will be led astray by cocksure prophets, and it is likely that their leaders will be either ignorant fanatics or dishonest charlatans. To endure uncertainty is difficult, but so are most of the other virtues.

The extent to which beliefs are based upon evidence is very much less than believers suppose. Take the kind of action which is most nearly rational: the investment of money by a rich City man. You will often find that his view (say) on the question whether the French franc will go up or down depends upon his political sympathies, and yet is so strongly held that he is prepared to risk money on it.

What makes a freethinker is not his beliefs but the way in which he holds them. If he holds them because his elders told him they were true when he was young, or if he holds them because if he did not he would be unhappy, his thought is not free; but if he holds them because, after careful thought he finds a balance of evidence in their favor, then his thought is free, however odd his conclusions may seem.

In a man whose reasoning powers are good, fallacious arguments are evidence of bias.

Our system of education turns young people out of the schools able to read, but for the most part unable to weigh evidence or to form an independent opinion. They are then assailed, throughout the rest of their lives, by statements designed to make them believe all sorts of absurd propositions, such as that Blank's pills cure all ills, that Spitzbergen is warm and fertile, and that Germans eat corpses.

Many orthodox people speak as though it were the business of sceptics to disprove received dogmas rather than of dogmatists to prove them.

to justify any such inference.

methods of increasing the degree of truth in our beliefs are well known; they consist in hearing all sides, trying to ascertain all the relevant facts, controlling our own bias by discussion with people who have the opposite bias, and cultivating a readiness to discard any hypothesis which has proved inadequate.

People will tell us that without the consolations of religion they would be intolerably unhappy. So far as this is true, it is a coward's argument. Nobody but a coward would consciously choose to live in a fool's paradise. When a man suspects his wife of infidelity, he is not thought the better of for shutting his eyes to the evidence. And I cannot see why ignoring evidence should be contemptible in one case and admirable in the other.

I wish to propose a doctrine which may, I fear, appear wildly paradoxical and subversive. The doctrine in question is this: that it is undesirable to believe a proposition when there is no ground whatever for supposing it true.

tener fe, es decir, tener una convicción que no puede ser debilitada por la evidencia contraria.

Where there is evidence , no one speaks of faith . We do not speak of faith that two and two are four or that the earth is round . We only speak of faith when we wish to substitute emotion for evidence .

When two men of science disagree, they do not invoke the secular arm; they wait for further evidence to decide the issue, because, as men of science, they know that neither is infallible. But when two theologians differ, since there are no criteria to which either can appeal, there is nothing for it but mutual hatred and an open or covert appeal to force.

To begin with rationality in opinion: I should define it merely as the habit of taking account of all relevant evidence in arriving at a belief. Where certainty is unattainable, a rational man will give most weight to the most probable opinion, while retaining others, which have an appreciable probability, in his mind as hypotheses which subsequent evidence may show to be preferable.

It may be laid down broadly that irrationalism, i.e. disbelief in objective fact, arises almost always from the desire to assert something for which there is no evidence, or to deny something for which there is very good evidence.

If the matter is one that can be settled by observation, make the observation yourself.

Persecution is used in theology, not in arithmetic, because in arithmetic there is knowledge, but in theology there is only opinion. So whenever you find yourself getting angry about a difference of opinion, be on your guard; you will probably find, on examination, that your belief is going beyond what the evidence warrants

The general principles of science, such as the belief in the reign of law, and the belief that every event must have a cause, are as completely dependent upon the inductive principle as are the beliefs of daily life All such general principles are believed because mankind have found innumerable instances of their truth and no instances of their falsehood. But this affords no evidence for their truth in the future, unless the inductive principle is assumed.

As regards the kind of belief: it is thought virtuous to have Faith - that is to say, to have a conviction which cannot be shaken by contrary evidence. Or, if contrary evidence might induce doubt, it is held that contrary evidence must be suppressed.

The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed, in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible

Ninguém senão um covarde escolheria conscientemente viver no paraíso dos tolos. Quando um homem suspeita da infidelidade de sua esposa, não lhe dizem que é melhor fechar os olhos à evidência. Não consigo ver a razão pela qual ignorar as evidências deveria ser desprezível em um caso e admirável no outro.

Show me your faith without works, and I will show you faith from my works. James 2:18

Even though He had performed so many signs in their presence, they did not believe in Him. John 12:37