Fear.

Fear is the strong, unpleasant emotion that expects something bad to happen. It is the root cause of every negative thought that eats away at your self-confidence and every worry that keeps you up at night. Fear is the voice that makes you doubt yourself. It is the voice that tells you to quit, that you shouldn’t bother trying, and that you don’t

This is precisely what the weak do everywhere. Through bitter experience they have learned how to exercise extreme care, how to behave so as to reduce the threat of immediate danger from their environment. Fear thus becomes a form of life assurance, making possible the continuation of physical existence with a minimum of active violence.

There is nothing new or recent about fear—it is doubtless as old as the life of man on the planet. Fears are of many kinds—fear of objects, fear of people, fear of the future, fear of nature, fear of the unknown, fear of old age, fear of disease, and fear of life itself.