Beware of false knowledge; it is more dangerous than ignorance.

There is little hope for us until we become toughminded enough to break loose from the shackles of prejudice, half-truths, and downright ignorance.

One of my big things is that I wish to be a fisherman. I know it sounds silly ​and I'd sooner be rich than poor, and all the rest of that... but I wish the pain was ignorance or bliss or something.

Truth is by nature self-evident. As soon as you remove the cobwebs of ignorance that surround it, it shines clear.

The more one thinks, the more one feels the hopeless immensity of man's ignorance.

Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.