I'd Rather Cry with the Saints

What does Tehillim mean when it says, "Rejoice with trepidation"? (Tehillim 2:11)

Rav Ada bar Matna said in the name of Rabba: When there is rejoicing, there should also be trepidation.

Abbaye was hanging out with Rabba.  Abbaye was clowning around.

Rabba said: "Don't you think you think you should be rejoicing with a little bit more trepidation?"

Abbaye said: "I am wearing tefillin."

Rebbe Yirmiya was hanging out with Rebbe Zera.  Rebbe Yirmyia was clowning around.

Rebbe Zera said: "Sadness is very profitable (Proverbs 14:23), you know."

Rebbe Yirmiya said: "I am wearing tefillin."

Mar the son of Ravina made a wedding feast for his son.  He saw that The Rabbis were clowning around, so he brought before them a precious glass cup worth 400 zuz and smashed it.  That way, he made sure The Rabbis would be sad.

Rav Ashi made a wedding feast for his son.  He saw that The Rabbis were clowning around, so he brought before them a white glass cup and smashed it.  That way, he made sure The Rabbis would be sad.

At the wedding feast of Mar the son of Ravina, The Rabbis said to Rav Hamnuna Zuti: Master, please sing us a song!  So he sang:

Oy vey, we are going to die!
Oy vey, we are going to die!

They asked him: "What is the chorus?"  And he sang:

Where is the Torah we learn?
Where are the mitzvot we do?
Why won't they protect us?

Rebbe Yochanan said in the name of Rebbe Shimon bar Yochai: It is forbidden to fill your mouth with laughter in this world, as it says in Tehillim: "Then our mouths will be filled with laughter and our tongues with joy." (Tehillim 126:2)  When will our mouths be filled with laughter?  When they declare among the nations, "Hashem has performed great wonders for the Chosen People."

They said of Resh Lakish that he never again filled his mouth with laughter from the day that he heard this teaching from the mouth of his Rebbe, Rebbe Yochanan.

(Brachot 30b - 31a)