I have never met a man so ignorant that I couldn't learn something from him.

I have never met a man so ignorant that I couldn't learn something from him.

Ignorance and inconsideration are the two great causes of the ruin of mankind

Ignorance and inconsideration are the two great causes of the ruin of mankind

Being ignorant is not so much a shame, as being unwilling to learn.

Being ignorant is not so much a shame, as being unwilling to learn.

By ignorance we mistake, and by mistakes we learn

By ignorance we mistake, and by mistakes we learn

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

The greatest ignorance is to reject something you know nothing about

The greatest ignorance is to reject something you know nothing about

Ignorance is the night of the mind, a night without moon or star

Ignorance is the night of the mind, a night without moon or star

To be ignorant of one's ignorance is the malady of the ignorant.

To be ignorant of one's ignorance is the malady of the ignorant.

But let a man know that there are things to be known, of which he
is ignorant, and it read more

But let a man know that there are things to be known, of which he
is ignorant, and it is so much carved out of his domain of
universal knowledge.