The proverb "All are not merry that dance lightly" means that not everyone who appears happy or carefree is truly so. In other words, people may pretend to be happy or cheerful, but they may actually be feeling sad, troubled, or worried inside.
This proverb is a reminder that we should not judge people based on their outward appearance. We may think that someone is having a great time, but we don't know what is going on inside their head or what they are feeling deep down.
Examples of the proverb:
* A person may be dancing at a party, but they may be thinking about a loved one who is sick or dying.
* A child may be playing and laughing, but they may be feeling scared or insecure.
* An adult may be smiling and making jokes, but they may be struggling with financial problems or a difficult job situation.
It is important to remember that not everyone is always as happy as they seem. We should be kind and understanding to everyone, even if they don't appear to be happy.
Similar proverbs:
* Don't judge a book by its cover.
* Appearances can be deceiving.
* Still waters run deep.