Ignorance is indeed bliss, but it is also dangerous and embarrassing.
Ignorance is bliss. I wish I still had some.
If ignorance is bliss, it's cuz she's never heard of this...
Happy the hare at morning, for she cannot read The hunter's waking thoughts.
If ignorance is bliss, why isn't the world happier?
What is hid is unknown: for what is unknown there is no desire. [Lat., Quod latet ignotum est; ignoti nulla cupido.]
The more you know the less the better.
When ignorance is bliss, there's folly in wisdom.
What a refreshing mind you have, young man. There really is nothing quite like total ignorance, is there?
A complacent satisfaction with present knowledge is the chief bar to the pursuit of knowledge.