"All the heroical fictions of ecclesiastical quixoticism"
That, claims, Wikipedia, is the first time quixoticism is mentioned, giving Pulpit Popery, True Popery as the source. Urban Dictionary defines quixoticism as unattainable idealism.
Let's take ism from quixoticism and we have quixotic. Anyone who knows Don Quixote would have an idea what the adjective is about. Merriam Webster defines it as foolishly impractical especially in the pursuit of ideals marked by rash lofty romantic ideas or extravagantly chivalrous action.
"It doesn't do to be quixotic. Telling the truth to people who misunderstand you is really promoting falsehood." ~ Anthony Hope
Then we take ic from quixotic and finally we have quixote. Enter (drum roll please) Don Quixote of La Mancha, the windmills, skinny Rosinante, ladylove Dulcinea.... Chivalry at its quixotic best!
"The Quixotes of this Age fight with the Wind-mills of their owne Heads"
- John Cleveland, The character of a London diurnall
This post is linked with ABC Wednesday.