"El creyente seguro de sí mismo es un pecador más grande a los ojos de Dios que el incrédulo preocupado"

Simplified Meaning:

Believing strongly in yourself isn't always a good thing if it leads to arrogance and pride. For example, someone might think they are perfect because they always go to church and follow the rules, but they might look down on others and ignore their own mistakes. On the other hand, a person who questions their beliefs and feels unsure might actually be closer to understanding their own flaws and trying to improve. Think of a student in school: the one who thinks they know everything might stop trying to learn, while the one who doubts themselves might work harder to learn and grow. So, it's more important to be humble and always look for ways to get better, rather than thinking you're already perfect. This way, you're more open to learning and becoming a better person.