It's easier to be a grownup than to be a kid. When you're a kid, you lie constantly and people are always calling you on it. And when you're a grownup, you lie constantly and people rarely do. Children are constantly being caught. Adults rarely so. Being an adult, you also get a free pass, which means you have to actively be a good person because nobody's around to tell you to do that. Even evil kids will be good when adults are watching. But once you're an adult, no one is. As a grownup, you've got an agency over your own life, which hopefully you use for the greater good and not evil.