There is nothing more frightful than ignorance in action
To die for an idea; it is unquestionably noble. But how much nobler it would be if men died for ideas that were true!
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts
May be related to 7(e) Stubbornness, 13(e) Overconfidence, 13(f) Naivety