"自分自身に恋してしまう者には競争相手はいない"

Simplified Meaning:

Loving oneself to the point of self-obsession means that a person cares more about their own achievements and appearance than anyone else's. When someone is their own biggest fan, they don't feel the need to compete with others or seek approval from them. For example, imagine a person who always admires their own reflection and praises their abilities loudly. Because they are so focused on themselves, they do not worry about others trying to outdo them or get ahead. They live in their own bubble of self-love and confidence, feeling content with who they are without depending on external validation. This way of thinking can make a person feel secure, but it might also lead them to ignore others' perspectives and feedback. While confidence is good, it's also important to balance it with humility and an awareness of the people around you.