A warning sign on a road reminds us that caution can protect us. Some quotes link caution to truth, saying it can drain the heart. Others list specific cautions about people, animals, and even priests, and they separate fear from careful awareness. The idea is to stay alert without letting fear freeze you.
![“My only supporter and comrade-in-arms was Georg Helm, who had endeavored to formulate an energetic conception of science before me and had presented his results in a treatise [Die Lehre von der Energie] exhibiting great independence of thought. But we were separated by his aversion to a realistic…” quote by Wilhelm Ostwald](https://sms4smile.com/quotes/i/e54/wilhelm-ostwald-28861_allies_my-only-supporter-and-comrade-in-arms-wa_142681.jpg)
