We cannot overcome obstacles with ignorance.

Nothing limits intelligence more than ignorance; nothing fosters ignorance more than one's own opinions; nothing strengthens opinions more than refusing to look at reality.

If there is something that opens horizons, it is precisely ignorance.

You asked for wisdom? Hear these words. Nothing limits intelligence more than ignorance; nothing fosters ignorance more than one's own opinions; nothing strengthens opinions more than refusing to look at reality.

Ignorance is of a peculiar nature: once dispelled, it is impossible to re-establish it. It is not originally a thing of itself, but is only the absence of knowledge; and though man may be kept ignorant, he cannot be made ignorant.

Ignorance is of a peculiar nature; once dispelled, it is impossible to reestablish it. It is not originally a thing of itself, but is only the absence of knowledge; and though man may be kept ignorant, he cannot be made ignorant.

Ignorance is of a peculiar nature: once dispelled, it is impossible to reestablish it. It is not originally a thing of itself, but is only the absence of knowledge; and though man may be kept ignorant, he cannot be made ignorant. The mind, in discovering truth, acts in the same manner as it acts through the eye in discovering objects; when once any object has been seen, it is impossible to put the mind back to the same condition it was in before it saw it.

True ignorance approaches the infinite more nearly than any amount of knowledge can do, and, in our case, ignorance is fortified by a certain element of nineteenth-century indifference which refuses to be interested in what it cannot understand; a violent reaction from the thirteenth century which cared little to comprehend anything except the incomprehensible.

Ignorance lies not in the things you don't know, but in the things you know that ain't so.

Ignorance can’t be pardoned. Only cured.

Ignorance immediately knows things in an ordinary, conceptual way. Because ignorance and its accompanying mental states arise first, wrong beliefs ensue. Therefore the texts say, "Ignorance conceals the true nature of obejcts."

Ignorance is bold, and knowledge is reserved

Action cannot destroy ignorance, for it is not in conflict with or opposed to ignorance. Knowledge does verily destroy ignorance as light destroys deep darkness.

Is it not clear...that you are not only ignorant of the greatest things, but while not knowing them you think that you do?