“I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.”

Simplified Meaning:

Some people have friends who are very simple, hardworking, and honest, maybe doing jobs that require getting dirty or wearing plain clothes, like overalls. These friendships are so valuable that they wouldn't trade them for even the most powerful and rich connections, like those with kings. It's saying that true friends who support and care about you are more important than impressing or trying to be close with very important people only because they have wealth or power. Imagine you have a friend who helps you move heavy furniture, checks on you when you are sick, and listens to your problems. Even though this friend does not have a fancy job or many resources, their kindness means so much more than knowing someone famous who never really shows care for you. In life, it's better to treasure genuine friendships that bring joy and support than to chase high-status relationships that might not be as sincere or loyal. This reminds us to appreciate those who stick with us no matter what, rather than those who are there just for show.