A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it.

Summary

This quote suggests that self-doubt can be self-destructive. When someone doubts themselves, it's akin to joining forces with their own enemies and working against their own success. By doubting themselves, they become convinced of their inevitable failure. The quote implies that self-belief and confidence are crucial for success, as doubting oneself only guarantees defeat. It emphasizes the importance of having faith in one's abilities and avoiding self-sabotage through negative self-perception.