Being ignorant is not so much a shame, as being unwilling to learn.
Your assumptions are your windows on the world. Scrub them off every once in a while, or the light won't come in.
A mind set in its ways is wasted. Don't do it.
The most fatal illusion is the settled point of view. Since life is growth and motion, a fixed point of view kills anybody who has one.
To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead, or endeavoring to convert an atheist by scripture.