Of persons and expectations, etc.: Hopeful or confident with reference to some particular issue. Earliest citation: 1673.
1. Cheerfully optimistic2. (in medieval medicine) having a predominance of blood among the bodily humours, supposedly marked by a ruddy complexion and an optimistic disposition.
ORIGIN: Old French, ‘blood red’, from Latin sanguis ‘blood’.
1. he is sanguine about the advance of technology. Optimistic, bullish, hopeful, buoyant, positive, confident, cheerful, cheery; informal upbeat. ANTONYM: gloomy.2. archaic: a sanguine complexion. ANTONYM: pale.ANTONYMS: pessimistic, morose, gloomy, somber, pale, pallid, wan.
Headline, New York Times, November 24, 2009:
Fed Sanguine About U.S. Recovery, Worried on Jobs
Federal Reserve officials are increasingly confident in a durable recovery for the US economy, even though they do Business...
[S]anguine, in the sense "optimistic, confident," is sometimes confounded with sanguinary (=  involving bloodshed; or  bloodthirsty—e.g): "Unfortunately, not all the members of the administration's environmental team appear to share thesanguinary [read sanguine] views of Hunt and Howes on the future of clean water." "Water Quality Advancing to the Rear." Herald-Sun (Durham, N.C.) 3 Jan. 1996.
The phrase "the best of all possible worlds" was coined by the German philosopher Gottfried Leibniz in his 1710 work Essays on Theodicy, concerning the Goodness of God, the Freedom of Man, and the Origin of Evil. It is the central argument in Leibniz's theodicy, or his attempt to solve the problem of evil.
Critics of Leibniz's postulate argue that the world contains an amount of suffering too great to justify optimism. While Leibniz argued that suffering is good because it incites human will, critics argue that the degree of suffering is too severe to justify belief that God has created the "best of all possible worlds."
Voltaire satirized optimism in his novel Candide [see below], in which the eternally optimistic character Dr. Pangloss remains optimistic, even when his situation is excessively dire, to a point where his optimism appears irrational.
proved admirably that there is no effect without a cause and that in this best of all possible worlds, My Lord the Baron's castle was the best of castles and his wife the best of all Baronesses. "Tis demonstrated," said he, "that things cannot be otherwise; for since everything is made for an end, everything is necessarily for the best end. Observe that noses were made to wear spectacles; and so we have spectacles. Legs were visibly instituted to be breeched, and we have breeches. . . . [A]nd as pigs were meant to be eaten, we eat pork all the year round; consequently, those who have asserted that all is well talk nonsense; they ought to have said that all is for the best." (1)
Illustration by Rockwell Kent.
[A]nd Pangloss sometimes said to Candide: "All events are linked up to this best of all possible worlds; for if you hand not been expelled from the noble castle, by hard kicks in your back side for love of Mademoiselle Cunegonde, if you had not been clapped into the Inquisition, if you had not wandered about America on foot, if you had not stuck your sword in the Baron, if you had not lost all your sheep from the land of Eldorado, you would not be eating citrons and pistachios here." • "'Tis well said," replied Candide, "but we must cultivate our gardens." (103)
Around the year 450 B.C. Hippocrates determined that four temperaments, derived from humours dominant in the human body, were responsible for a person’s behavior and the way they looked at the world; and therefore, there were four basic types of people:The Choleric (liver)The Sanguine (blood)The Phlegmatic (phlegm)The Melancholy (bile [kidneys])
A stable person would have all four temperaments or humours in balance.
Someone who was sanguine was the sparkling blithe spirit of the bunch, thrived in company, and enjoyed the spotlight. Their home lives tended to be happy and they were faithful in their relationships. Yet one of sanguine temperament also had the tendency to be shallow, enjoy peripheral relationships, go along with majority decisions regardless of his own convictions, and therefore his ideas could be changeable. These days we might call him a flip-flopper. In fact, many politicians these days might indeed be ruled by this humour.
A Phlegmatic was a stable sort who lacked the vibrancy of the sanguine personality to the point of appearing passionless, although he did form warm relationships (as opposed to antagonistic ones) with others. He was contemplative and tended to take his time to consider a situation, which lent him the appearance of seeming detached because he did not allow his own judgment or preferences to cloud a situation. Like the sanguine temperament, a Phlegmatic will go with the flow, but for the sake of tradition, rather than expedience. This was the temperament capable of detailed analysis: the writer, forensics specialist, or judge.
The Choleric was a zealous type, quick to anger, and impatient and disgusted with those who don’t see things his way or who he sees as less intelligent than himself. With him it’s all or nothing, his way or the highway. They are leaders and achievers. But the Choleric can also be tender toward someone who has been maligned or injured—as long as that person is on the Choleric’s side. The Choleric is as intimidating a personality as he is an inspiring one, a leader who still manages to divide; the type who champions a cause he thinks will benefit all, yet who often ends up alone because of it. We’re back to politicians again; I’m sure you can think of a few snarling pit-bull types. Being a New Yorker, a native son who used to have a really bad comb-over comes to mind. So does a certain lame duck and his duck-hunting Vice.
The Melancholic is both an idealist and a doubter with little use for rules. Nothing he sees on earth meets with his approval; consequently he seems permanently disappointed, and in fact, a Melancholic’s downfall is despair and depression. His awareness of what the real world is like pains him because he knows it will never live up to his ideals for what it should be. He is slow to form relationships, but when he does, they are lasting ones (as long as they don’t end in disappointment). Injustice or personal harm to himself or one he loves can set him off like a cannon. Nearly every character John Wayne played, and hard-boiled noir detectives like Dashiell Hammett’s Sam Spade fit this description.
—Character Analysis: The Four Temperaments, firstname.lastname@example.org, 30 Jan. 2008.
Consanguineous refers to kinship, to being related by blood and ancestry.▶[kon'sang-gwin'i-us]
A person exhibiting sang-froid (in French, literally, "cold blood") is composed and imperturbable. (The robbers carried off he heist with complete and incrediblesangfroid.) Antonyms — disconfiture, uneasiness, agitation, nervousness.▶[san-frwa']
Sangria, a cold drink make of red wine, fruit juice, sugar, soda water, and fruit slices, is so called because of its bloodlike color. ▶[san-gree'-uh]
—Bob and Maxine Moore. From the Roots: Growing a Vocabulary. New York: New Chapter Press, 1993, 149.
May your lives during the New Year of 2010 be enriched with sanguine expectations and correspondingly rewarding fulfillments. —Bloggin' John.