http://revach.net/article.php?id=4674

Section:  Avodah   Category: Chanoch L'Naar
The Chidushei HaRim Cries Over The Death Of His Thirteenth Child
The Chiddushei HaRim of Ger lost 13 children in his lifetime l"a.  The last one he lost was his Bechor, Rav Avrohom Mordechai, the father of the Sfas Emes.  After his death, the Chiddushei HaRim was unconsolable, crying without stop.  

Seeing that it was getting out of hand, one of the people close to him came to him and said, "Rebbe, if this is how you act, what is this teaching all of your Chasidim?"  The Chiddushei HaRim replied, "What do you think, I am crying over, Din Shamayim?  If I wanted I could have made sure he remained alive but I don't tell Hashem what to do.  If that is what Hashem wants then so be it.  I am His, and everything I have belongs to Him."

"If so why do you cry so much", asked the Chosid?  "I am crying because until now I had a Mitzva of "V'Shinantam L'Vanecha", to teach my children Torah (VaEschanan 6:7).  I had one son remaining with whom I was able to do this Mitzva.  Now this entire Mitzva has been taken from me and therefore I cry." (Chinuch Malchusi)

The Chiddushei HaRim cried over the mitzva that he could not do without a son.  If we do not learn Torah with our children, then what do we have them for?