Opinions derived from long experience are exceedingly valuable, and outweigh all others, while they are consistent with facts and with each other; but they are worse than useless when they lead, as in this instance, to directly opposite opinions.
--
Peter Barlow (1835). Second report addressed to the directors and proprietors of the London and Birmingham Railway company, founded on an inspection of, and experiments made on the Liverpool and Manchester railway. B. Fellowes. p. 4.Peter Barlow (mathematician)
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The principle itself of dogmatic religion, dogmatic morality, dogmatic philosophy, is what requires to be rooted out; not any particular manifestation of that principle. ¶ The very corner-stone of an education intended to form great minds, must be the recognition of the principle, that the object is to call forth the greatest possible quantity of intellectual power, and to inspire the intensest love of truth: and this without a particle of regard to the results to which the exercise of that power may lead, even though it should conduct the pupil to opinions diametrically opposite to those of his teachers. We say this, not because we think opinions unimportant, but because of the immense importance which we attach to them; for in proportion to the degree of intellectual power and love of truth which we succeed in creating, is the certainty that (whatever may happen in any one particular instance) in the aggregate of instances true opinions will be the result; and intellectual power and practical love of truth are alike impossible where the reasoner is shown his conclusions, and informed beforehand that he is expected to arrive at them.
John Stuart Mill
Somewhere we taught ourselves that our opinions are more significant than the facts. And somehow we get our egos and our opinions and Truth all mixed up in a single package, so that when something does challenge one of the notions to which we subscribe, we react as if it challenges us.
Jack McDevitt
Human opinions are formed by accident and hardened by repetition. We cling to acquired opinions only because they give the illusion of being wise opinions. This creates division and hostility between people.
Vernon Howard
When I consider the Question, Whether there are such Persons in the World as those we call Witches? my Mind is divided between the two opposite Opinions; or rather (to speak my Thoughts freely) I believe in general that there is, and has been such a thing as Witchcraft; but at the same time can give no Credit to any Particular Instance of it.
Joseph Addison
As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed. As long as the connection subsists between his reason and his self-love, his opinions and his passions will have a reciprocal influence on each other; and the former will be objects to which the latter will attach themselves.
James Madison
Barlow, Peter (mathematician)
Barnes, Albert
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