Self-improvement

Thinking as a Science by Henry Hazlitt: Free Ebook and Summary (2026)

By TopFreeBooks · Published · Updated · 9 min read

Illustrated TopFreeBooks cover in navy and cream: an open notebook with a checklist and a red pencil, titled Thinking as a Science: Free Ebook and Summary

Henry Hazlitt wrote *Thinking as a Science* in 1916 as a short practical manual: how to think on purpose, how to read without letting the author do your thinking, and why writing your thoughts down matters. Project Gutenberg hosts it free in the USA as ebook #57243. TopFreeBooks lists the edition at Thinking as a Science. This guide links only TopFreeBooks listings and the Gutenberg source, quotes lines checked against the Gutenberg plain text, and includes an honest note on a few passages that have aged badly.

Key facts

Author
Henry Hazlitt (1894–1993), American journalist and writer; the book dates from 1916
Text
Thinking as a Science, E. P. Dutton, 1916; Gutenberg #57243 (released 31 May 2018)
Form
Eleven short chapters, from “The Neglect of Thinking” to “Books on Thinking”
Licence
Public domain in the USA (Gutenberg #57243)
Core idea
Think with a purpose and a method, and do a little unaided thinking before you read about a subject
Best paired with
How We Think, Mental Efficiency, The Wisdom of Life

How we checked these are free and legal

Quotations and the flagged passages were checked against the Project Gutenberg plain text of ebook #57243 (E. P. Dutton, 1916). This is targeted verification, not a complete line-by-line review or an assurance that every issue has been identified. Bibliographic details come from the Gutenberg ebook page (author Hazlitt, Henry, 1894-1993; public domain in the USA; release date 31 May 2018) and from the TopFreeBooks catalogue year 1916. Readers outside the USA should check local copyright rules.

Is Thinking as a Science free and legal to download?

Yes, in the United States. Thinking as a Science on Project Gutenberg (ebook #57243) is offered as a public-domain text with almost no restrictions on reuse. TopFreeBooks lists the same edition at Thinking as a Science, so you can read it in the formats Gutenberg provides without a signup wall.

Always check your own country’s copyright rules before downloading. Gutenberg treats this 1916 release as public domain in the USA. TopFreeBooks only lists editions we have verified as free to read.

The big idea: do not outsource your thinking to reading

The first chapter opens with a confession: “I, too, have a pet little evil, to which in more passionate moments I am apt to attribute all the others. This evil is the neglect of thinking.” Hazlitt does not mean daydreaming. He defines the term: “when I use the word thinking, I mean thinking with a purpose, with an end in view, thinking to solve a problem.”

His target is the reflex to “read up” the moment we are stuck. He asks, “Briefly, did it ever occur to you to think?” The book is an argument that reading is a tool for thinking, not a substitute for it.

That is also why it pairs well with John Dewey’s How We Think, which treats reflective thinking in a more academic register, and with Arnold Bennett’s Mental Efficiency for the same period’s habits-of-mind advice.

Chapter map (what to read first)

The contents list eleven chapters: The Neglect of Thinking; Thinking With Method; A Few Cautions; Concentration; Prejudice and Uncertainty; Debate and Conversation; Thinking and Reading; Writing One’s Thoughts; Things Worth Thinking About; Thinking as an Art; and Books on Thinking.

If you only have an hour, read chapter VII on reading, which is the book’s most practical part, then chapter IV on concentration and chapter VIII on writing. Chapter II shows “method” through an example of a man deciding which subjects schools should teach, and how a vague question becomes a clearer one. Chapter III is about cautions: Hazlitt compares thinking without cautions to a car without steering, but notes the two cannot really be separated.

Chapter XI is a short reading list. It singles out Schopenhauer’s essay on thinking for oneself as “especially recommended”, and names John Locke’s *The Conduct of the Understanding* as the other classic. For Schopenhauer on TopFreeBooks, see The Wisdom of Life.

The best quotes and what they mean

**On concentration.** “Concentration does not, as popularly supposed, mean keeping the mind fastened on one object or idea or in one place. It consists in having a problem or purpose constantly before one.” The practical reading: write the question you are working on at the top of the page and keep returning to it.

**On talking it through.** One method needs no equipment: “It consists in simply talking your thoughts as you think them.” Hazlitt argues you notice wandering at once when you speak, and a stop in your speech shows a stop in your thought. He also admits you should not let others hear you doing it.

**On prejudice.** Hazlitt separates prejudice from intolerance, and warns: “Prejudice has less connection with truth and falsity than is generally supposed.” An unprejudiced person is not automatically right, and a prejudiced one is not automatically wrong.

**On habit.** In chapter X he writes, “To know is one thing; to do another,” and “We do not act according to knowledge; we act according to habit.” Knowing the method is not the same as using it; the book asks for deliberate practice.

Hazlitt’s reading method in five steps

Chapter VII gives the plan most readers remember. “Assuming you have chosen a subject, your first step should be to do a little unaided thinking on it.” Then, in his own sequence: choose a comprehensive text book; read it critically; note the problems you think are not adequately treated and think those out yourself; read a second book the same way if useful; and after that, read other books on the subject “hop, skip and jump” fashion for the new problems or solutions they suggest.

In practice: (1) write what you already think about the topic; (2) read one solid book with a notebook open; (3) list the points you doubt; (4) answer them in your own words before moving on; (5) then widen your reading selectively. Hazlitt also notes the law of diminishing returns: “The law of diminishing returns applies to an entire subject as well as to a single book.” A new subject often pays back more than another book on the same one.

He quotes Gibbon’s habit of reviewing what he already knew before opening a new book, then criticises it as “not critical enough”, almost amounting to making sure what your prejudices are and using them as spectacles. For note-keeping, chapter VIII suggests a notebook kept specially for thoughts and some blank paper and a pencil to hand. If you keep a reading journal, Memory: How to Develop, Train, and Use It is a useful companion.

What has aged badly

Content note: this is a 1916 text and the examples reflect its time. In chapter III, Hazlitt uses the question of whether characteristics acquired in one lifetime can be inherited, and writes that it asks about “the present day savage” and, “assuming that the negro race is inferior to the white race”, whether education could raise it to “the white race level”. He also asks whether the hope of improving the human race lies in education or eugenics. The passage is meant to show why such a question should not be left to one method alone, but the assumption is racist and the eugenics framing is outdated; this guide does not endorse either.

Chapter II uses women’s suffrage as an example of deductive reasoning: “Both the supporters and opponents of woman suffrage have often decided the question without consulting at all the actual results achieved in the States where women vote.” The point is about method, but the example is dated, and the surrounding language about “woman’s supposed mental qualities” reflects assumptions of the period.

Treat the book as a method manual from 1916, not as a source on psychology or society. The reading plan and the writing-and-concentration advice are the parts that travel best.

Five ways to use it today

Before opening any article or book, write three sentences on what you already think. After reading, mark the one claim you most doubt and answer it in writing. Use the talk-it-through method on a hard decision for ten minutes. Pair the book with The Art of Controversy when you want to test your arguments, or with Pragmatism for a contemporary philosophy of what ideas are worth. And keep the thinking habit going with Counsels and Maxims.

The books

More on this topic: Self-improvement shelf.

Official sources (checked 9 Nov 2026)

Questions

Is Thinking as a Science by Henry Hazlitt public domain?

Yes in the USA. Project Gutenberg lists it as ebook #57243, public domain in the USA. Check local copyright rules before downloading outside the USA.

Where can I read Thinking as a Science free legally?

From Project Gutenberg or the TopFreeBooks page for Thinking as a Science. Avoid random mirrors that strip attribution.

What is the main idea of Thinking as a Science?

Real thinking means thinking with a purpose and a method, and reading should serve it: do a little unaided thinking on a subject, read critically with a notebook, and think out the problems you doubt.

What is Hazlitt’s method for reading a book?

Think a little first, choose a comprehensive text book, read it critically and note problems you doubt, think those out yourself, then read further books “hop, skip and jump” for new problems and solutions.

Is this the same Henry Hazlitt who wrote on economics?

Gutenberg lists the author as Hazlitt, Henry, 1894-1993, and the book is dated 1916. This guide does not make further claims about his other work.

What has aged badly in the book?

Content note: chapter III includes an example on inherited characteristics that mentions “the present day savage”, “assuming that the negro race is inferior to the white race” and eugenics, and uses women’s suffrage as a method example with period assumptions about “woman’s supposed mental qualities”. These are features of the historical text, not views endorsed by this guide.

What should I read after Thinking as a Science?

John Dewey’s How We Think, Arnold Bennett’s Mental Efficiency, Schopenhauer’s The Wisdom of Life or The Art of Controversy, all listed free on TopFreeBooks.

See all posts →Every TopFreeBooks guide and reading list in one place.

General information only. Public-domain status is for the USA, so check your own country. We never host files; every link goes to the official source.