And the third sin is...

And oldie but still goodie.

Rabbi to his congregation:

• Remember, Jews, there are only three grave sins. The first one is Schadenfreude. If, for instance, your neighbor's cow has died, you shouldn't gloat but sympathize with him.
• The second grave sin is despair. If you have only one cow, which is old and barely gives any milk - do not complain, be glad that you have it, while somebody may not have even one.

A voice from the congregation: - But rabbi, you just said that to be happy when someone doesn't have a cow is Schadenfreude, which is a mortal sin, so how...

• And the third grave sin is tediousness!