You must not enthrone ignorance just because there is much of it.
Where conceit and ignorance sit, grass will not grow again.
To change one's mind is rather a sign of prudence than ignorance.
Laugh and show your ignorance.
It is profound ignorance that inspires the dogmatic tone.
It is better to conceal one's knowledge than to reveal one's ignorance.
Ignorance is sweet for the soul.
Ignorance is not privileged by titular degrees.
Ignorance is a voluntary misfortune.