A man who sits on a throne has it blue. You can’t get it out of a stone. If it boils there’s fury. If there’s none there’s no foul. It freezes when horror is known.

The answer to this riddle, a vital fluid, is deeply ingrained in our language and history, reflecting both its biological importance and its symbolic power. The first clue, mentioning a "blue" quality for someone on a throne, refers to the historical concept of "blue blood," a term used to denote aristocracy and noble lineage, particularly in European cultures. This metaphorical "blueness" also has a subtle biological echo, as deoxygenated versions of this fluid, though reddish-purple, can appear bluish through the skin in veins.

Its organic nature ensures you cannot extract it from a stone; it is a fundamental component of living beings. The riddle further plays on common idioms. When intense anger or passion takes over, we often say this essential bodily fluid "boils," vividly describing a state of fury. Conversely, moments of extreme fear or horror are frequently expressed by saying this fluid "freezes" or "runs cold," highlighting its close link to our deepest physiological and emotional responses.

The phrase "if there's none there's no foul" underscores its critical role in life itself. Without this fluid, life cannot exist, and thus, there can be no injury, no "foul play," and ultimately, no life to experience such events. This substance is truly the essence of vitality, carrying oxygen and nutrients throughout the body, and its symbolic weight in human expression is just as profound.