sourceAnguish is almost always confused with fear. However, they are two completely different states of mind. As the philosopher S. Kierkegaard first understood, fear, or anxiety, is an instinct triggered by a real and often imminent threat: an instinct closely tied to one’s survival (principium conservationis). Later, Heidegger identified three types of fear in his work Being and Time: shock (an unexpected and sudden fear), horror (a fear caused by a perceived threat), and terror (the combination of both shock and horror, being sudden and continuous). Anguish, on the other hand, is a feeling not determined by any identifiable factor. It does not arise from a specific threat but is rather an undefined anxiety that pushes us to decide on a possibility that life presents to us: possibilities that may or may not happen. A possibility that entails a freedom of choice concerning real facts that influence us.