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.
- And the third grave sin is tediousness!