I'm struggling to understand this
[definition](http://dictionary.goo.ne.jp/jn/186406/meaning/m0u/):

> ［名・形動］他人の意見を無視して、自分だけでよいと思い込んでいること。また、そのさま。どくぜん。「―な（の）言動」. 「デジタル大辞泉」

Namely this part:

> 自分だけでよいと思い込んでいる

I am not sure what "thinking that only yourself is good" (can't find a less
awkward literal way to translate) would mean in Japanese.

Arrogant? (e.g. giving advice in a patronizing manner)

Or acts only out of self interest? (e.g. not giving advice thinking it would
be a waste of time but being humble about it)

Or - only values his own opinion (short-sighted, myopic - disregarding any
opinions that may be contrary to his own).

Could someone please help me clarify how someone would use 独り善がりの考え to
describe someone?

お助けください
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question
meaning
独｛ひと｝り善｛よ｝がりの考え - what does it mean?
> "I am not sure what " ** _thinking that only yourself is good_** " (can't
> find a less awkward literal way to translate) would mean in Japanese."

But that is not what the definition says. It says:

> 「自分だけ **で** よいと思い込んでいる」

It does not say:

> 「自分だけ **が** よいと思い込んでいる」

「自分だけ **で** 」 means " **only among oneself** " literally. ⇒ "You falsely
believe something is good (without listening to others' opinions)."

> "Arrogant?"

No, that is what 「自分だけ **が** よいと思い込んでいる」 roughly means.

> "Or acts only out of self interest? (e.g. not giving advice thinking it
> would be a waste of time but being humble about it)"

Getting kinda closer but not very much. You still clearly have "arrogant" in
your head. A「独りよがりな人」 is not open to others' advice. It is not that s/he does
not give advice to others. In fact, s/he will probably give lots of **biased**
advice to others.

> "Or - only values his own opinion (short-sighted, myopic - disregarding any
> opinions that may be contrary to his own)."

Finally! I had been wanting to hear that!

**If you are a self-satisfied and complacent kind of person, you would be
called 「独りよがりな人」 and your ideas would be called 「独りよがりな考え」.**

EDIT: It might help to think of 「よがり」 as the noun form of the verb 「よがる」,
which means "to consider good", "to feel satisfied", etc. 「独りよがり」 is doing
that all by yourself without consulting others.

<https://kotobank.jp/word/%E5%96%84%E3%81%8C%E3%82%8B%E3%83%BB%E8%89%AF%E3%81%8C%E3%82%8B-405290#E5.A4.A7.E8.BE.9E.E6.9E.97.20.E7.AC.AC.E4.B8.89.E7.89.88>
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answer