Antisthenes. An Athenian, a Socratic philosopher from [among] the orators, who was first called a Peripatetic, then became a Cynic; he was the son of a father who had the same name, but a mother who was Thracian by race. This man wrote ten volumes altogether: the first [was] on magic; it told the story of a certain mage Zoroaster, who discovered wisdom; but some have attributed this to Aristotle, others to Rhodon. So this man also began the philosophy of Cynicism, which was so called because he taught it in the Cynosarges gymnasium. And he became the mentor of Diogenes the Cynic and the rest.
When Antisthenes was suffering from a long and intractable illness Diogenes gave him a dagger, saying, “If you should require a friend's services.” Thus that man thought of death as nothing painful, such that illness became altogether a luxury. [Altogether] meaning totally.
Source: “Antisthenes.” Suda On Line. Tr. Jennifer Benedict. 1 June 2001. 2 March 2014. <http://www.stoa.org/sol-entries/alpha/2723>.