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Related to ignorance: Ignorance is bliss

willful ignorance

An intentional obliviousness to something that one knows to be true. I can't believe you're still smoking, despite knowing all the risks! Your willful ignorance just blows me away.
See also: ignorance

ignorance is bliss

It is better to remain unaware or ignorant of things that may otherwise cause one stress; if you don't know about something, you don't need to worry about it. The expression comes from poem with Thomas Gray, "Ode on a Distant Prospect of Eton College," from 1742: "Where ignorance is bliss, 'tis folly to be wise." Sometimes I just decide to ignore the news for a few days. Ignorance is bliss, I tell you. When it comes to what my kids end up eating at their grandparents' house, ignorance is bliss.
See also: bliss, ignorance

Ignorance is bliss.

Prov. Not knowing is better than knowing and worrying. A: I never knew that the kid who mows our lawn has been in trouble with the police. B: Ignorance is bliss!
See also: bliss, ignorance

Ignorance (of the law) is no excuse (for breaking it).

Prov. Even if you do not know that something is against the law, you can still be punished for doing it. (An ancient legal principle.) Police officer: I'm giving you a speeding ticket. Motorist: But I didn't know I was exceeding the speed limit! Police officer: Ignorance of the law is no excuse for breaking it. Terry protested that he didn't know it was illegal to break the windows of an abandoned building, but the judge informed him that ignorance of the law was no excuse.
See also: excuse, ignorance

keep someone in ignorance (about someone or something)

to prevent someone from learning specific information about someone or something. I think we had better keep them all in ignorance about the money for a while. I don't know about her. I have kept my self in ignorance on purpose.
See also: ignorance, keep

Where ignorance is bliss, 'tis folly to be wise.

Prov. If knowing something makes you unhappy, it would be better not to know it. (Also the cliché: ignorance is bliss.) Ellen: The doctor didn't tell Dad that Mom probably won't recover from her illness. Do you think we should tell him? Bill: No. It would only make him unhappy and ruin their last months together. Where ignorance is bliss, 'tis folly to be wise.
See also: folly, ignorance, wise

ignorance is bliss

What you don't know won't hurt you. For example, She decided not to read the critics' reviews-ignorance is bliss. Although its truth may be dubious at best, this idea has been expressed since ancient times. The actual wording, however, comes from Thomas Gray's poem, "Ode on a Distant Prospect of Eton College" (1742): "Where ignorance is bliss, 'tis folly to be wise."
See also: bliss, ignorance

ignorance is bliss

People say ignorance is bliss to mean that it is pleasant not to know about something because then you do not worry about it. In the morning there were fresh footprints outside my tent but it was one of those occasions when I decided ignorance is bliss. I'm glad I didn't know too much about my eye operation — ignorance is bliss.
See also: bliss, ignorance

ˌignorance is ˈbliss

(saying) if you do not know about something, you cannot worry about it: Some doctors believe ignorance is bliss and don’t give their patients all the facts.
See also: bliss, ignorance
References in classic literature ?
But this discovery was reserved for the invincible bravery of our noble countrymen, who, not discouraged by the dangers of a navigation in seas never explored before, have subdued kingdoms and empires where the Greek and Roman greatness, where the names of Caesar and Alexander, were never heard of; who have demolished the airy fabrics of renowned hypotheses, and detected those fables which the ancients rather chose to invent of the sources of the Nile than to confess their ignorance.
Casaubon's position since he had last been in the house: it did not seem fair to leave her in ignorance of what would necessarily affect her attitude towards him; but it was impossible not to shrink from telling her.
I am very ignorant--you will quite wonder at my ignorance," said Dorothea.
An excellent study, for she enjoys it, and I mean to teach her how to manage her nerves so that they won't be a curse to her, as many a woman's become through ignorance or want of thought.
The first step in the process of teaching has made him conscious of his own ignorance.
Characteristic also of the temper of the Socratic enquiry is, (4) the proposal to discuss the teachableness of virtue under an hypothesis, after the manner of the mathematicians; and (5) the repetition of the favourite doctrine which occurs so frequently in the earlier and more Socratic Dialogues, and gives a colour to all of them--that mankind only desire evil through ignorance; (6) the experiment of eliciting from the slave-boy the mathematical truth which is latent in him, and (7) the remark that he is all the better for knowing his ignorance.
The papers revived all the old anecdotes in which the "sun of the wolves" played a part; they recalled the influences which the ignorance of past ages ascribed to her; in short, all America was seized with selenomania, or had become moon-mad.
Such was then the extent of knowledge possessed by every American on the subject, and of which no one could decently profess ignorance.
With respect to the distinct species of the same genus, which on my theory must have spread from one parent-source; if we make the same allowances as before for our ignorance, and remember that some forms of life change most slowly, enormous periods of time being thus granted for their migration, I do not think that the difficulties are insuperable; though they often are in this case, and in that of the individuals of the same species, extremely grave.
And about knowledge and ignorance in general; see whether you think that any man who has knowledge ever would wish to have the choice of saying or doing more than another man who has knowledge.
As we were now agreed that justice was virtue and wisdom, and injustice vice and ignorance, I proceeded to another point:
Let those of high life, therefore, no longer despise the ignorance of their inferiors; nor the vulgar any longer rail at the vices of their betters.
Not only doth he lie, who speaketh contrary to his knowledge, but more so, he who speaketh contrary to his ignorance.
Khamenehi cited the era of ignorance that prevailed before Mohammad brought the message of the Qoran.
Taking advantage of ignorance J POWELL, (Letters, April 16), raises the long boring mantra "sorry there is no money left".