The first philosopher to outline the themes that came to be known as cynicism was Antisthenes, who had been a pupil of Socrates in the late 5th century BCE. He was followed by Diogenes of Sinope, who lived in a tub on the streets of Athens. Diogenes took Cynicism to its logical extremes, and came to be seen as the archetypal Cynic philosopher. He was followed by Crates of Thebes who gave away a large fortune so he could live a life of Cynic poverty in Athens. Cynicism spread with the rise of Imperial Rome in the 1st century, and Cynics could be found begging and preaching throughout the cities of the Empire. Cynicism finally disappeared in the late 5th century, although many of its ascetic and rhetorical ideas were adopted by early Christians.
Some historians have noted the similarities between the life and teachings of Jesus and those of the Cynics. Some scholars have argued that the Q document, the hypothetical common source for the gospels of Matthew and Luke, has strong similarities with the teachings of the Cynics. Scholars on the quest for the historical Jesus, such as Burton L. Mack and John Dominic Crossan of the Jesus Seminar, have argued that 1st century Galilee was a world in which Hellenistic ideas collided with Jewish thought and traditions. The city of Gadara, only a day's walk from Nazareth, was particularly notable as a center of Cynic philosophy, and Mack has described Jesus as a "rather normal Cynic-type figure." For Crossan, Jesus was more like a Cynic sage from an Hellenistic Jewish tradition than either a Christ who would die as a substitute for sinners or a Messiah who wanted to establish an independent Jewish state of Israel.
Many of the ascetic practices of Cynicism were undoubtedly adopted by early Christians, and Christians often employed the same rhetorical methods as the Cynics. Some Cynics were actually martyred for speaking out against the authorities. One Cynic, Peregrinus Proteus, lived for a time as a Christian before converting to Cynicism, whereas in the 4th century, Maximus of Alexandria, although a Christian, was also called a Cynic because of his ascetic lifestyle. Christian writers would often praise Cynic poverty, although they scorned Cynic shamelessness. The ascetic orders of Christianity also had direct connection with the Cynics, as can be seen in the wandering mendicant monks of the early church who in outward appearance, and in many of their practices were little different from the Cynics of an earlier age.
Their philosophy was that the purpose of life was to live a life of Virtue in agreement with Nature. This meant rejecting all conventional desires—including the desires for fortune and fame—and by living a simple life free from all possessions. As reasoning creatures, people could gain happiness by rigorous training and by living in a way which was natural for humans. They believed that the world belonged equally to everyone, and that suffering was caused by false judgments of what was valuable and by the worthless customs and conventions which surrounded society. Many of these thoughts were later absorbed into Stoicism.
Various philosophers, such as the Pythagoreans, had advocated simple living in the centuries preceding the Cynics. In the early 6th century BCE, Anacharsis, a Scythian sage had combined plain living together with criticisms of Greek customs in a manner which would become standard among the Cynics. Perhaps of importance were tales of Indian philosophers, known to later Greeks as the Gymnosophists, who had adopted a strict asceticism together with a disrespect for established laws and customs. By the 5th century BCE, the Sophists had begun a process of questioning many aspects of Greek society such as religion, law and ethics. However, the most immediate influence for the Cynic school was Socrates. Although he was not an ascetic, he did profess a love of Virtue and he seemed to have an indifference to wealth, together with a distrust of general opinion. These aspects of Socrates' thought became the central inspiration for another of Socrates' pupils, Antisthenes.
Antisthenes (ca. 450 – 360 B.C.), was the Ancient Greek philosopher who founded the philosophy that came to be known as cynicism. Most of his views stemmed from his early Sophist orientation, even though he became one of Socrates' most devoted followers. He believed that man's happiness lay in cultivating virtue for its own sake. However, Antisthenes idealized a way to attain virtue; according to him, people must reduce their dependence on the external world to a minimum, disregard social convention, shun pleasure, and live in poverty. Antisthenes, like Xenophanes, repudiated polytheism, substituting one god, whom he described as unlike anything known to man. His view that each individual is unique had implications for ethics.
DIOGENES OF SINOPE (c. 400-325 BC), thought by many to also be the founder of the Cynics, lived in Athens and perhaps Corinth. He may have been taught by Antisthenes, but it was his life and influence that gave the Cynics their importance. He taught that the right way of life was to have the simplest possible needs and to satisfy them in the most direct way. In particular, whatever is natural is honorable and decent, and can therefore be done without any shame. Conventions contrary to this openness should be ignored. The ethic is not just one of self-sufficiency, but more one of self-mastery born of a healthy contempt for one's own pleasures and pains, and especially born of impatience with the conventions and hierarchies of a presumably corrupt society: “Aristotle breakfasts when it pleases the king; Diogenes, when it pleases Diogenes.”
Cynicism is one of the most striking of all the Hellenistic philosophies. It offered people the possibility of happiness and freedom from suffering in an age of uncertainty. Although there was never an official Cynic doctrine, the fundamental principles of Cynicism can be summarized as follows:
The goal of life is happiness which is to live in agreement with Nature.
1. Happiness depends on being self-sufficient, and a master of mental attitude.
2. Self-sufficiency is achieved by living a life of Virtue.
3. The road to virtue is to free oneself from any influence such as wealth, fame, or power, which has no value in Nature.
4. Suffering is caused by false judgments of value, which cause negative emotions and a vicious character.
Thus (taken to the extreme) a Cynic has no property and rejects all conventional values of money, fame, power or reputation. A life lived according to nature requires only the bare necessities required for existence, and one can become free by unshackling oneself from any needs which are the result of convention. The Cynic way of life required continuous training, not just in exercising one's judgments and mental impressions, but a physical training as well:
Diogenes used to say, that there were two kinds of exercise: that, namely, of the mind and that of the body; and that the latter of these created in the mind such quick and agile impressions at the time of its performance, as very much facilitated the practice of virtue; but that one was imperfect without the other, since the health and vigor necessary for the practice of what is good, depend equally on both mind and body.
None of this meant that the Cynic would retreat from society, far from it; Cynics would live in the full glare of the public's gaze and would be quite indifferent in the face of any insults which might result from their unconventional behavior. The Cynics believed (as did Socrates) in the idea of cosmopolitanism: when he was asked where he came from, Diogenes replied that he was "a citizen of the world.
The ideal Cynic would evangelize; as the watchdog of humanity, it was their job to hound people about the error of their ways. The example of the Cynic's life (and the use of the Cynic's biting satire) would dig-up and expose the pretensions which lay at the root of everyday conventions.
Although Cynicism concentrated solely on ethics, Cynic philosophy had a big impact on the Hellenistic world, ultimately becoming an important influence for Stoicism. The Stoic named Apollodorus, writing in the 2nd century BCE, stated that "Cynicism is the short path to virtue."
The classical Greek and Roman Cynics regarded virtue as the only necessity for happiness, and saw virtue as entirely sufficient for attaining happiness. Classical Cynics followed this philosophy to the extent of neglecting everything not furthering their perfection of virtue and attainment of happiness. They sought to free themselves from conventions; become self-sufficient; and live only in accordance with nature. They rejected any conventional notions of happiness involving money, power, or fame, to lead entirely virtuous, and thus happy, lives.
The ancient Cynics rejected conventional social values, and would criticize the types of behaviors, such as greed, which they viewed as causing suffering. The modern definition of cynicism is in marked contrast to the ancient philosophy, which emphasized "virtue and moral freedom in liberation from desire."