ignorance is bliss
US /ˈɪɡ.nər.əns ɪz blɪs/
UK /ˈɪɡ.nər.əns ɪz blɪs/

1.
知らぬが仏, 知らない方が幸せ
not knowing something can be better than knowing it, especially if the knowledge would cause you worry or sadness
:
•
Sometimes, ignorance is bliss, especially when it comes to office gossip.
時として、知らぬが仏、特に職場のうわさ話に関しては。
•
I didn't want to know the details of the accident; for me, ignorance is bliss.
事故の詳細を知りたくなかった。私にとっては、知らぬが仏だ。