Confidence is ignorance. If you're feeling cocky, it's because there's something you don't know.

This quote means that having confidence in yourself is actually a form of ignorance. When you are feeling very sure of yourself, it is likely because you do not know something important that you should know. This means that having true confidence should come from humility, where you understand that there may be things you do not know and there is always room to learn and grow.