Sherlock Holmes says in the book, The Study of Scarlet:
I consider that a manâs 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.
This was written in 1887. Imagine how heâd feel today â phone buzzing in his pocket, social media feeds gushing out useless information.
Deciding what to pay attention to is hard, overlooked, and most important, itâs a negative skill â itâs about what you willfully ignore as much as what you actively seek out.
Francis Crick, who discovered the double helix structure of DNA, was once asked what it takes to win the Nobel Prize. He responded: âOh itâs very simple. My secret had been I know what to ignore.â
Author John Barry writes:
Einstein reportedly once said that his own major scientific talent was his ability to look at an enormous number of experiments and journal articles, select the very few that were both correct and important, ignore the rest, and build a theory on the right ones.
The best reading strategy Iâve come across is the idea of a wide funnel and tight filter. Be willing to read anything that looks even a little interesting, but abandon it quickly and without mercy if itâs not working for you.
Be choosy about what you let into your attic.
A few other things Iâve found helpful in choosing what to pay attention to:
When reading an article, book, or report, ask, âWill I still care about this in a year?â
Five years? Ten?
Most of the time youâll realize you wonât care about whatever youâre reading in a week. Itâs newsy â maybe itâs interesting, but it has an expiration date.
There are two types of knowledge: Expiring and permanent.
Expiring knowledge is things like quarterly earnings, election polls, market information, and politics. It catches more attention than it should, for two reasons. One, thereâs a lot of it, eager to capture our short attention spans. Two, we chase it down, anxious to squeeze out insight before it loses relevance.
Permanent knowledge tends to be principles and frameworks that help you make sense of expiring information.
I read newspapers and books every day. I can not recall one thing I read in a newspaper from, say, 2011. But I can tell you details about a few great books I read in 2011 and how they changed how I think. Iâll remember them forever. Iâll keep reading newspapers. But if I read more books Iâd probably develop better filters and frameworks that would help me make better sense of the news.
Asking how long youâll care about the information you read pushes you to focus on permanent things and care little about temporary things â a great mindset for long-term thinking.
Memorize stories, highlight facts, skip the fluff
Thereâs a line I love: People donât remember books; they remember sentences.
More specifically, they remember stories.
Even in the best book youâve ever read, what do you remember? A couple sentences, a few stories. Those sentences and stories might change your life, but theyâre all youâll take away from a book.
I try to remember that when reading. For nearly every blog post and most non-fiction books: there is no need to devour and focus on every word. If I can remember a few great stories and epic lines, itâs a win.
Too many readers get too bogged down in details theyâre never going to remember anyways, when they could have pulled a few memorable lines out of a book and moved onto the next.
Pay close attention when someone you admire disagrees on a topic youâre passionate about.
Charles Darwin, according to Charlie Munger, wasnât exceptionally bright, but became a first-class scientist because he spent his life trying to prove himself wrong. âOne of the great things to learn from Darwin is the value of extreme objectivity,â Munger once said. âHe tried to disconfirm his ideas as soon as he got âem. He quickly wrote down in his notebook anything that disconfirmed a much-loved idea.â
That is an amazing trick, and for most people the way to disconfirm your own beliefs is paying attention to people who disagree with you.
But thatâs hard, because itâs so easy to assume those who disagree with you arenât as smart or informed as you are. A lot of good ideas are ignored, or intentionally rejected, because they are said by people you donât admire.
If youâre not blessed with perfect empathy, the trick to opening your mind to viewpoints you disagree with is to find people whose views on one topic you respect â that checks the box in your head that says âthis person isnât crazyâ â and listen to them about topics you disagree on.
When those two things align â a person you admire disagrees with you about something fundamental â pay close attention. Thereâs a good chance this is information youâll want stored in your head.