I'm a comedian. I make comic films and there are certain ideas that occur to me that are comic, with heavy, serious undertones. There are some ideas that are more frivolous to me. The next idea that could occur to me could be comedy about death and famine or something.
Nirvana is very funny. It's not sincere particularly. It's rather frivolous, actually.
There are those who scoff at the schoolboy, calling him frivolous and shallow: Yet it was the schoolboy who said 'Faith is believing what you know ain't so'.