mad today, glad tomorrow
You're mad today because someone said something stupid, but tomorrow you'll be glad because you'll realize they're just a dumb person.
My neighbor said my lawn is a disgrace. I'm mad now. But tomorrow I'll be glad because I'll be too busy looking at my own disgrace.
My friend called me a donkey. I'm mad now. But tomorrow I'll be glad because I'll be too busy being a donkey.
My brother said I'm the worst brother ever. I'm mad now. But tomorrow I'll be glad because I'll be too busy being the worst brother ever.