Source identified1
“The art of not reading is highly important.”
Selecting what not to read protects limited attention from being consumed by material that is merely fashionable, noisy, or low-value.
Source note: Essay “On Books and Reading”; the surrounding passage explains selective reading rather than hostility to books generally.
Source identified2
“Reading is thinking with some one else's head instead of one's own.”
Reading supplies another mind’s thought, but Schopenhauer warns that consuming ideas should not replace the work of forming one’s own connected judgment.
Source note: Essay “On Books and Reading,” in a public-domain English collection of Schopenhauer’s essays.
Source identified3
“One can never read too little of bad, or too much of good books: bad books are intellectual poison; they destroy the mind.”
The deliberately severe contrast argues that reading quality matters because repeated exposure influences the habits and material of thought.
Source note: Essay “On Books and Reading,” public-domain English text.
Source identified4
“it is only when he has turned it over that he can be said to know it.”
Learning becomes knowledge, in this account, when material has been actively reconsidered and integrated rather than merely encountered or memorized.
Source note: The Art of Literature, section “On Thinking for Oneself,” T. Bailey Saunders translation; Project Gutenberg #10714. The preceding sentence says a person must first learn something before turning it over in the mind.
Source identified5
“Good writing should be governed by the rule that a man can think only one thing clearly at a time”
Schopenhauer makes clarity of sentence structure answer to the limits of attention, arguing that prose should help the reader follow one thought distinctly instead of forcing several at once.
Source note: The Art of Literature, section “On Style,” T. Bailey Saunders translation; Project Gutenberg #10714. The following discussion criticizes overloaded parenthetical sentence construction.
Source identified6
“Therefore instead of contracting his words and forms of speech, let a writer enlarge his thoughts.”
Schopenhauer argues that stronger writing should come from fuller thought rather than from compressing weak ideas into mannered phrasing, tying style to intellectual substance.
Source note: The Art of Literature, section “On Style,” T. Bailey Saunders translation; Project Gutenberg #10714. The English volume rearranges material drawn from Schopenhauer’s Parerga.
Source identified7
“a man may have a great mass of knowledge, but if he has not worked it up by thinking it over for himself, it has much less value than a far smaller amount which he has thoroughly pondered.”
Accumulated information is distinguished from understanding: Schopenhauer values knowledge that has been actively compared, connected and reconsidered over a larger but unprocessed store.
Source note: The Art of Literature, section “On Thinking for Oneself,” T. Bailey Saunders translation; Project Gutenberg #10714. The library analogy immediately precedes the sentence.
Source identified8
“it is only where a man is convinced of the truth and importance of his thoughts, that he feels the enthusiasm necessary for an untiring and assiduous effort to find the clearest, finest, and strongest expression for them”
The passage connects conviction with revision effort: ideas considered important deserve sustained work toward clearer and stronger expression rather than careless presentation.
Source note: The Art of Literature, section “On Style,” T. Bailey Saunders translation; Project Gutenberg #10714. This is literary counsel within a nineteenth-century essay on style.