Based on a Naaleh.com shiur by Rabbi Hershel Reichman
The Shem Mishmuel quotes a perplexing Gemara in Brachot. The Rabbis asked Rav Hamnuna to sing a song at a wedding and he began to sing, “Woe to us people, we will die. Where is the Torah and mitzvot that will protect us?” Why did Rav Hamnuna sing such a mournful tune at a wedding?
The Shem Mishmuel explains that marriage is the antithesis of death. It is a binyan adei ad, an eternal structure that is created through the couple’s descendants. In this world, both the soul and body can ascend by making the right choices. After death, the soul can no longer be sanctified by engaging and lifting physicality. If it didn’t achieve what it needed to on this world it cannot do it anymore after death. But the Gemara says there is a way out. If a couple’s children continue to do mitzvot it is as if the parents never died and their souls will continue to ascend in heaven. That’s why Rav Hamnuna mentioned death and mitzvot. Clearly the mitzvah of peru urevu, having children, is a central part of the joy of a wedding.
In Parshat Balak, Bilam says concerning Hashem, “The Almighty in heaven counts the offspring of the Jewish people.” Chazal say this refers to children. Bilam questioned how Hashem could be involved in something so physical.
The Shem Mishmuel explains that in many ways the material world is the antithesis of purity and sanctity. There are religions that teach their adherents to live an ascetic life. Bilam only understood spirituality as an entity on its own. However, the mainstream Torah view, which is emphasized by Chassidut, is to take physicality and elevate it to spirituality. This is the secret of Torah. There is holiness embedded in the material world which is brought out through the mitzvot.
The most important institution where this idea is expressed is the Jewish marriage. The deeper one digs in a mine, the better quality diamonds one finds. The more physical something is, the more sanctity can be extracted. Marriage is called kiddushin. The kohen gadol, the holiest leader of the Jewish people was required to have a wife. The bond of marriage creates a very deep and intense holiness.
The Gemara explains that when we dance at a wedding we lift our body up in the air. We take physicality and elevate it to something holy. This is the essence of marriage. Hashem fashioned man in His Divine Image. He gave us the power to create. Hashem is the third partner in bringing children into the world and since He is eternal it is a binyan adei ad (an everlasting structure).
When we raise children to serve Hashem, we generate more holiness. Chassidut emphasizes the concept of “Olam chesed yibaneh.” Hashem created the world as an act of kindness. He wanted to give us reward in the next world. Bringing up children is one of the greatest acts of chesed, a part of which is sharing the wisdom of Torah with them. Spend ten minutes a day with each child one on one, preferably with a Torah book. In this way you will be actualizing one of the greatest aspects of kedusha of a Jewish marriage.