Sherlock on knowledge

I consider that a man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the lumber of every sort that he comes across, so that the knowledge which might be useful to him gets crowded out, or at best is jumbled up with a lot of other things so that he has a difficulty in laying his hands upon it. Now the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order. It is a mistake to think that that little room has elastic walls and can distend to any extent. Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

It is a capital mistake to theorize before you have all the evidence. It biases the judgment.

Sherlock Holmes, by Arthur Conan Doyle in A Study in Scarlet

All women ... were calculating—even if their calculations took place somewhere south of their conscious awareness. All women weighed and measured; did not always listen to the results rationally, but made efforts in that direction that most men I knew could not duplicate or understand. 

Greg Bear,  Legacy

What’s wisdom but knowing what is right, and what is the right thing to do?

Iain M. Banks, Use of Weapons

We are what we do, not what we think.  Only the interactions count.

Iain Banks, The Player of Games

The births of all things are weak and tender; and therefore we should have our eyes intent on beginnings; for as when, in its infancy, the danger is not perceived, so when it is grown up, the remedy is as little to be found.

'Tis a misfortune to be at such a pass, that the best test of truth is the multitude of believers in a crowd, where the number of fools so much exceeds the wise.

Montaigne

Our struggle in life requires two virtues, bravery and wisdom -- readiness to endure a danger and skillful knowledge of how to manage it.

Gorgias (the Sophist)

We must not rivet ourselves so fast to our humours and complexions: our chiefest sufficiency is to know how to apply ourselves to divers employments.
 
The principal use of reading to me is, that by various objects it rouses my reason, and employs my judgment, not my memory. 

Montaigne

Content yourself ... to swim in troubled waters without fishing in them.

Montaigne

While sitting at the fireside in the winter, at ease on soft couches, well fed, sipping tasty wine and nibbling tidbits, it is then that a host may duly inquire of his guest:  Who are you among men, and whence do you come?

Xenophanes, (per Philip Wheelwright, The PreSocratics)

They who retire themselves from the common offices, from that infinite number of troublesome rules that fetter a man of exact honesty in civil life, are in my opinion very discreet.

Montaigne

I am not obliged not to utter absurdities, provided I am not deceived in them and know them to be such....

We easily enough confess in others an advantage of courage, strength, experience, activity, and beauty, but an advantage in judgment we yield to none....

This capacity of trying the truth, whatever it be, in myself, and this free humour of not over easily subjecting my belief, I owe principally to myself; for the strongest and most general imaginations I have are those that, as a man may say, were born with me; they are natural and entirely my own. I produced them crude and simple, with a strong and bold production, but a little troubled and imperfect; I have since established and fortified them with the authority of others and the sound examples of the ancients, whom I have found of the same judgment.

Montaigne, Essays, Second Book, Chapter 17.

Maybe working on the little things as dutifully and honestly as we can is how we stay sane when the world is falling apart.

Haruki Murakami, Men Without Women

In truth, knowledge is not so absolutely necessary as judgment; the last may make shift without the other, but the other never without this.

Michel de Montaigne

A strong memory is commonly coupled with infirm judgement.

Michel de Montaigne