He that is of a merry heart hath a continual feast.
It makes you happy to be around a happy person. Not one who’s a clown and has to be making jokes all the time - but just a happy person. (You don’t have to make any noise, but you can still be happy.) A happy person is usually contented, and his happiness and contentment will rub off on others. A happy person will be one that’s at peace, too. I know a young man who is miserable - all the time. Nothing makes him happy. And guess what? He’s always alone! No one wants to be with him. As Christians we should be happy. Let it show!