Charles Sanders Peirce Quotes
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Charles Sanders Peirce was an American philosopher, logician, mathematician, and scientist who is sometimes known as "the father of pragmatism". He was educated as a chemist and employed as a scientist for thirty years. Today he is appreciated largely for his contributions to logic, mathematics, philosophy, scientific methodology, semiotics, and for his founding of pragmatism.

An innovator in mathematics, statistics, philosophy, research methodology, and various sciences, Peirce considered himself, first and foremost, a logician. He made major contributions to logic, but logic for him encompassed much of that which is now called epistemology and philosophy of science. He saw logic as the formal branch of semiotics, of which he is a founder, which foreshadowed the debate among logical positivists and proponents of philosophy of language that dominated 20th-century Western philosophy. Additionally, he defined the concept of abductive reasoning, as well as rigorously formulated mathematical induction and deductive reasoning. As early as 1886 he saw that logical operations could be carried out by electrical switching circuits. The same idea was used decades later to produce digital computers.In 1934, the philosopher Paul Weiss called Peirce "the most original and versatile of American philosophers and America's greatest logician". Webster's Biographical Dictionary said in 1943 that Peirce was "now regarded as the most original thinker and greatest logician of his time". Wikipedia  

✵ 10. September 1839 – 19. April 1914
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Charles Sanders Peirce: 121   quotes 2   likes

Charles Sanders Peirce Quotes

“All the monads except as serve as intermediaries for the connections have distinctive designations.”

Source: Mathematical Monads (1889), p. 268
Context: As the mathematics are now understood, each branch — or, if you please, each problem, — is but the study of the relations of a collection of connected objects, without parts, without any distinctive characters, except their names or designating letters. These objects are commonly called points; but to remove all notion of space relations, it may be better to name them monads. The relations between these points are mere complications of two different kinds of elementary relations, which may be termed immediate connection and immediate non-connection. All the monads except as serve as intermediaries for the connections have distinctive designations.

“The next simplest feature that is common to all that comes before the mind, and consequently, the second category, is the element of Struggle.”

Lecture II : The Universal Categories, § 2 : Struggle, CP 5.45
Pragmatism and Pragmaticism (1903)

“The definition of definition is at bottom just what the maxim of pragmatism expresses.”

Letter to William James (8 January 1909)

“The entire universe is perfused with signs, if it is not composed exclusively of signs.”

Quoted in Essays in Zoosemiotics (1990) by Thomas A. Sebeok

“Let us not pretend to doubt in philosophy what we do not doubt in our hearts.”

Vol. V, par. 265
Collected Papers (1931-1958)

“By an object, I mean anything that we can think, i. e. anything we can talk about.”

"Reflections on Real and Unreal Objects", Undated, MS 966

“You are of all my friends the one who illustrates pragmatism in its most needful forms. You are a jewel of pragmatism.”

Letter to William James (16 March 1903), published in The thought and character of William James, as revealed in unpublished correspondence and notes (1935) by Ralph Barton Perry, Vol. 2, p. 427

“Mere imagination would indeed be mere trifling; only no imagination is mere.”

Vol. VI, par. 286
Collected Papers (1931-1958)

“Understand me well. My appeal is to observation — observation that each of you must make for himself.”

Lecture II : The Universal Categories, § 2 : Struggle, CP 5.53
Pragmatism and Pragmaticism (1903)

“Do not block the way of inquiry.”

Vol. I, par. 135
Collected Papers (1931-1958)

“The idea does not belong to the soul; it is the soul that belongs to the idea.”

Vol. I, par. 216
Collected Papers (1931-1958)

“All the evolution we know of proceeds from the vague to the definite.”

Vol. VI, par. 191
Collected Papers (1931-1958)

“Be it understood, then, that what we have to do, as students of phenomenology, is simply to open our mental eyes and look well at the phenomenon and say what are the characteristics that are never wanting in it, whether that phenomenon be something that outward experience forces upon our attention, or whether it be the wildest of dreams, or whether it be the most abstract and general of the conclusions of science.
The faculties which we must endeavor to gather for this work are three. The first and foremost is that rare faculty, the faculty of seeing what stares one in the face, just as it presents itself, unreplaced by any interpretation, unsophisticated by any allowance for this or for that supposed modifying circumstance. This is the faculty of the artist who sees for example the apparent colors of nature as they appear. When the ground is covered by snow on which the sun shines brightly except where shadows fall, if you ask any ordinary man what its color appears to be, he will tell you white, pure white, whiter in the sunlight, a little greyish in the shadow. But that is not what is before his eyes that he is describing; it is his theory of what ought to be seen. The artist will tell him that the shadows are not grey but a dull blue and that the snow in the sunshine is of a rich yellow. That artist's observational power is what is most wanted in the study of phenomenology. The second faculty we must strive to arm ourselves with is a resolute discrimination which fastens itself like a bulldog upon the particular feature that we are studying, follows it wherever it may lurk, and detects it beneath all its disguises. The third faculty we shall need is the generalizing power of the mathematician who produces the abstract formula that comprehends the very essence of the feature under examination purified from all admixture of extraneous and irrelevant accompaniments.”

Lecture II : The Universal Categories, § 1 : Presentness, CP 5.41 - 42
Pragmatism and Pragmaticism (1903)

“The word "God," so "capitalised" (as we Americans say), is the definable proper name, signifying Ens necessarium; in my belief Really creator of all three Universes of Experience.”

I, Ens necessarium is a latin expression which signifies "Necessary being, necessary entity"
A Neglected Argument for the Reality of God (1908)

“Effort supposes resistance.”

Vol. I, par. 320
Collected Papers (1931-1958)

“If the sensation that precedes the present by half a second were still immediately before me, then on the same principle, the sensation preceding that would be immediately present, and so on ad infinitum.”

Now, since there is a time [period], say a year, at the end of which an idea is no longer ipso facto present, it follows that this is true of any finite interval, however short.
The Law of Mind (1892)