Summary
This quote suggests that when faced with temptation, our true inner desires and weaknesses are revealed. Similar to how fire brings the impurities or scum to the surface of a liquid, temptation acts as a catalyst that exposes our hidden vices and flaws. It implies that when confronted with temptation, our innermost motives and intentions become apparent, and we are forced to confront the aspects of our character that we may not be proud of.