"The atmosphere of libraries, lecture rooms and laboratories is dangerous to those who shut themselves up in them too long. It separates us from reality like a fog"

In this quote, Alexis Carrel is alerting against the prospective threats of spending excessive time in the controlled environments of libraries, lecture spaces, and labs. He recommends that these spaces, while valuable for discovering and research study, can likewise have a negative influence on people who separate themselves within them for extended amount of times. Carrel compares this isolation to a fog, which obscures our connection to the outside world and separates us from truth. This could be interpreted as a caution versus ending up being too soaked up in academic pursuits and neglecting the importance of experiencing and engaging with the world around us.