知らないほうが幸せな場合には、知ることは愚である。の英語

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

There are things you're better off not knowing.

To know that we know what we know, and that we do not know what we do not know, that is true knowledge.

of a person, pretending not to know something even though she or he does know it, because knowing it is inconvenient

I know one of them but not the other.

He talks as if he knew everything while he knows nothing at all.

He knows nothing, and yet he talks as if he knew everything

One may as well not know a thing at all, as know it but imperfectly.

It is dangerous to prejudge what you do not know.

of an act, feigning ignorance

a wiseacre

I wouldn't know.

These things are often unknown to the world.

To put it succinctly, I don't know, and I don't want to know.

As if you didn't know!

to pretend not to know something even though one knows it

pretend ignorance

I don't know both.

It is no use your pretending that you know nothing.

Don't speak like you know. Even though you don't know anything about me.

Some people think they know everything.

profess ignorance

As if you knew everything!

of a person, blatantly pretending not to know something even though she or he does know it

Only a fool thinks he knows everything.

The more you know, the less you understand.

The more you know the less you know.

If only I knew, I would tell you all that I knew.

Nor am I ashamed to confess my ignorance.

That thing is not well known.