Katalepsis
Encyclopedia
Katalepsis in Stoic
STOIC
STOIC was a variant of Forth.It started out at the MIT and Harvard Biomedical Engineering Centre in Boston, and was written in the mid 1970s by Jonathan Sachs...

 philosophy, meant comprehension
Understanding
Understanding is a psychological process related to an abstract or physical object, such as a person, situation, or message whereby one is able to think about it and use concepts to deal adequately with that object....

. It is a term that originally refers to the Stoic
STOIC
STOIC was a variant of Forth.It started out at the MIT and Harvard Biomedical Engineering Centre in Boston, and was written in the mid 1970s by Jonathan Sachs...

 philosophers and was to them, a landmark ideological premise regarding one's state of mind as it relates to grasping fundamental philosophical concepts.

Stoicism

According to the Stoics, the mind
Mind
The concept of mind is understood in many different ways by many different traditions, ranging from panpsychism and animism to traditional and organized religious views, as well as secular and materialist philosophies. Most agree that minds are constituted by conscious experience and intelligent...

 is constantly being bombarded with impressions (phantasias). (An impression arising from the mind was called a phantasma.)
Some of these impressions are true and some false. Impressions are true when they are truly affirmed, false if they are wrongly affirmed, such as when one believes an oar dipped in the water to be broken because it appears so. When Orestes
Orestes
Orestes was the son of Agamemnon in Greek mythology; Orestes may also refer to:Drama*Orestes , by Euripides*Orestes, the character in Sophocles' tragedy Electra*Orestes, the character in Aeschylus' trilogy of tragedies, Oresteia...

, in his madness, mistook Electra
Electra
In Greek mythology, Electra was an Argive princess and daughter of King Agamemnon and Queen Clytemnestra. She and her brother Orestes plotted revenge against their mother Clytemnestra and stepfather Aegisthus for the murder of their father Agamemnon...

 for a Fury
Erinyes
In Greek mythology the Erinyes from Greek ἐρίνειν " pursue, persecute"--sometimes referred to as "infernal goddesses" -- were female chthonic deities of vengeance. A formulaic oath in the Iliad invokes them as "those who beneath the earth punish whosoever has sworn a false oath"...

, he had an impression both true and false: true inasmuch as he saw something, viz., Electra; false, inasmuch as Electra was not a Fury. The Stoics said that one ought not to give credit to everything which is perceived, but only to those perceptions which contain some special mark of those things which appeared. Such a perception then was called a kataleptic phantasia , or comprehensible perception. The kataleptic phantasia is that which is impressed by an object which exists, which is a copy of that object and can be produced by no other object.

Cicero
Cicero
Marcus Tullius Cicero , was a Roman philosopher, statesman, lawyer, political theorist, and Roman constitutionalist. He came from a wealthy municipal family of the equestrian order, and is widely considered one of Rome's greatest orators and prose stylists.He introduced the Romans to the chief...

 relates that Zeno
Zeno of Citium
Zeno of Citium was a Greek philosopher from Citium . Zeno was the founder of the Stoic school of philosophy, which he taught in Athens from about 300 BC. Based on the moral ideas of the Cynics, Stoicism laid great emphasis on goodness and peace of mind gained from living a life of virtue in...

 would illustrate katalepsis as follows:

he would display his hand in front of one with the fingers stretched out and say "A visual appearance is like this"; next he closed his fingers a little and said, "An act of assent is like this"; then he pressed his fingers closely together and made a fist, and said that that was comprehension (and from this illustration he gave to that process the actual name of katalepsis, which it had not had before); but then he used to apply his left hand to his right fist and squeeze it tightly and forcibly, and then say that such was knowledge, which was within the power of nobody save the wise man


Katalepsis was the main bone of contention between the Stoics and Academic Skeptics
Academic skepticism
Academic skepticism refers to the skeptical period of ancient Platonism dating from around 266 BC, when Arcesilaus became head of the Platonic Academy, until around 90 BC, when Antiochus of Ascalon rejected skepticism. Like their fellow Pyrrhonists, they maintained that knowledge of things is...

 of Plato's Academy
Platonic Academy
The Academy was founded by Plato in ca. 387 BC in Athens. Aristotle studied there for twenty years before founding his own school, the Lyceum. The Academy persisted throughout the Hellenistic period as a skeptical school, until coming to an end after the death of Philo of Larissa in 83 BC...

, during the Hellenistic period
Hellenistic period
The Hellenistic period or Hellenistic era describes the time which followed the conquests of Alexander the Great. It was so named by the historian J. G. Droysen. During this time, Greek cultural influence and power was at its zenith in Europe and Asia...

. The Greek Skeptics
Philosophical skepticism
Philosophical skepticism is both a philosophical school of thought and a method that crosses disciplines and cultures. Many skeptics critically examine the meaning systems of their times, and this examination often results in a position of ambiguity or doubt...

 (who of course chose the Stoics as their natural philosophical opposites) debated much of what the Stoics eschewed regarding the human mind and one's methods of understanding greater meanings. To the Skeptics, all perceptions were acataleptic
Acatalepsy
Acatalepsy , in philosophy, is incomprehensibleness, or the impossibility of comprehending or conceiving a thing...

, i.e. bore no conformity to the objects perceived, or, if they did bear any conformity, it could never be known.

Modern era

Informally in modern times, katalepsis means that one has reached a state of complete understanding (regarding all things, almost literally "beyond" everything). It is also referred to extensively in the book "Darwin's Blade" by Dan Simmons, first in the context of a Vietnam era
Vietnam War
The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

sniper (the protagonist in his earlier life) who reaches a complete killing state without conscious hindrance [albeit out of complete and proper/morally approved necessity. Essentially without negative moral or social connotation]. From then on, the author's subsequent use of the term implies that modern humans [specifically the main characters] can reach this "state of katalepsis" in any given critical situation, especially those that require mental or spiritual fortitude.
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