Between 1424 and 1433 he worked on the translation of the Lives and Opinions of Eminent Philosophers by Diogenes Laërtius, which came to be widely circulated in manuscript form and was published at Rome in 1472 ( the first printed edition of the Lives ; the Greek text was printed only in 1533 ).

** Diogenes Laërtius, Vitae philosophorum ( Lives and Opinions of Eminent Philosophers )

The main source for the life of Heraclitus is Diogenes Laërtius, although some have questioned the validity of his account as " a tissue of Hellenistic anecdotes, most of them obviously fabricated on the basis of statements in the preserved fragments.

Timon of Phlius calls him " the riddler " ( ainiktēs ) according to Diogenes Laërtius, who had just explained that Heraclitus wrote his book " rather unclearly " ( asaphesteron ) so that only the " capable " should attempt it.

Diogenes Laërtius ascribes to Theophrastus the theory that Heraclitus did not complete some of his works because of melancholia.

Diogenes Laërtius divides the physiologoi into two groups, Ionian and Italiote, led by Anaximander and Pythagoras, respectively.

The knowledge we have of them derives from accounts of later philosophical writers ( especially Aristotle, Plutarch, Diogenes Laërtius, Stobaeus and Simplicius ), and some early theologians, ( especially Clement of Alexandria and Hippolytus of Rome ).

Most of the details known about his life come from the anecdotes preserved by Diogenes Laërtius in his Lives and Opinions of Eminent Philosophers.

Diogenes Laërtius has preserved many clever and witty remarks by Zeno, the veracity of which cannot be ascertained.

According to Persaeus ( Diogenes Laërtius vii.

A plausible chronology for his life is as follows: He was born 334 / 3 BC, and came to Athens in 312 / 11 BC at the age of 22 ( Diogenes Laërtius, vii.

He studied philosophy for about 10 years ( Diogenes Laërtius, vii.

Diogenes Laërtius gives two different accounts of his death.

Around 387 BC, at the age of 23, he traveled with the physician Theomedon, who according to Diogenes Laërtius some believed was his lover, to Athens to study with the followers of Socrates.

But most modern scholars, following the suggestion of Diogenes Laërtius, consider them to be forgeries, some forged by the philosopher Heraclides Ponticus, others by or altered by Christian writers:

Diogenes Laërtius preserves several different accounts of this story ; one of them has Crates giving his money away to the citizens of Thebes, apparently after seeing the beggar king Telephus in a tragedy ; whereas another account has him placing his money in the hands of a banker, with the agreement that he should deliver it to his sons, unless they too became philosophers, in which case he should distribute it among the poor.

Crates wrote a book of letters on philosophical subjects, the style of which is compared by Diogenes Laërtius to that of Plato ; but these no longer survive.

* Diogenes Laërtius ( between 200 – 500 CE ), historian

* Diogenes Laërtius, Lives and Opinions of Eminent Philosophers, translated by Charles Duke Yonge ( 1853 ) ( Uses a different method of enumerating the sections from the modern editions.

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simple: Diogenes Laërtius

Diogenes Laërtius says that his works filled ten volumes, but of these, only fragments remain.

Most of the biographical information we have of Theophrastus was provided by Diogenes Laërtius ' Lives of the Philosophers, written more than four hundred years after Theophrastus ' time.

From the lists of Diogenes Laërtius, giving 227 titles, it appears that the activity of Theophrastus extended over the whole field of contemporary knowledge.

Diogenes points out, however, that there was among his sources great disagreement over which figures should be counted among the seven.

Diogenes claims however that he tossed it aside.

Already in antiquity, however, Diogenes Laërtius and the sources used by the Suda attributed the work to Philip of Opus.

Anna however retained her loyalty to Diogenes and was soon targeted by the new government ( by her old enemy, the Caesar John Doukas, uncle of Michael VII ) for it.

The principal object of the ambassadors, however, was to support the accusation which was brought against the deposed king Ariarathes V ; and Diogenes and his coadjutor, Miltiades, succeeded in their plan, and lies and calumnies gained the victory, as there was no one to undertake the defence of Ariarathes.

Diogenes Laertius states that Xenophon was sometimes known as the " Attic Muse " for the sweetness of his diction ; very few poets wrote in the Attic dialect.

In comparison, Socrates accepted no fee, instead professed a self-effacing posture, which he exemplified by Socratic questioning ( i. e. the Socratic method, although Diogenes Laertius wrote that Protagoras — a sophist — invented the " Socratic " method ).

The same poem was said by Diogenes Laertios to have stirred Athenians more than any other verses that Solon wrote:

According to Diogenes Laertius, he wrote some 400 books, of which none are extant today, although a few titles are known.

He wrote some fifty works, of which only fragments have survived preserved by writers such as Diogenes Laërtius, Stobaeus, Cicero, Seneca and Plutarch.

According to Diogenes Laërtius, Xenophanes wrote in hexameters and also composed elegies and iambics against Homer and Hesiod.

Diogenes Laërtius, on the authority of Sotion and Panaetius, gives a long list of books whose authorship is ascribed to Aristippus, though he also says that Sosicrates of Rhodes states that he wrote nothing.

Diogenes Laërtius, on the authority of Sotion and Panaetius, provides a long list of books said to have been written by Aristippus, though he also says that Sosicrates stated that he wrote nothing.

Diogenes Laertius, who lived in the 3rd century, wrote Lives, Teachings, and Sayings of Famous Philosophers, a useful, though often unreliable, sourcebook.

The stereotype is very old: the ancient Greek biographer Diogenes Laërtius wrote that the philosopher Thales walked at night with his eyes focused on the heavens and, as a result, fell down a well.

He also wrote in prose, to the quantity, according to Diogenes Laërtius, of twenty thousand lines.

We learn from Diogenes Laërtius that Onesicritus wrote a work about Alexander called How Alexander was Educated (), imitating the style of Xenophon, though he fell short of him as a copy does of the original.

According to Diogenes Laërtius, he wrote very few books, but left a great number of disciples.

There are several passages in Cicero from which we may infer that Diogenes wrote on other subjects also, such as duty, the highest good, and the like.

It was long believed that Lucian of Samosata had Diogenes ' work principally in mind when he wrote his celebrated parody, the Verae Historiae, though J. R. Morgan has more recently questioned this accepted notion on extensive comparative study of the two works.