"無垢な人々の信頼は嘘つきにとって最も有用な道具です"

Simplified Meaning:

When someone who tells lies finds a person who is very trusting and believes everyone, it becomes easy for the liar to deceive them. Think about a young child who believes everything they hear and doesn't know that people can be dishonest. A dishonest person could trick the child because the child doesn't doubt them and accepts their lies as truth. For example, imagine a con artist trying to scam people out of their money. If they find someone who trusts easily without questioning, it’s very simple for the con artist to convince them to hand over their savings. The trusting person’s innocence and belief in the goodness of everyone make them an easy target. To protect yourself from this, it’s important to be cautious about who you trust and always ask questions if something seems off. This doesn’t mean you should never trust anyone but instead, you should be aware that not everyone has good intentions. By being careful, you can avoid being taken advantage of by dishonest people.