The horror, the pain, the tragedy that just took place in Mumbai, India, does not allow for many -- or any -- words.

That one of the locations targeted by the terrorists was a Jewish center makes this attack more difficult for us as Jews. As rabbi of the Chabad Student Center at the University of Colorado, the murder of Chabad representatives Rabbi Gavriel and Mrs. Rivkah Holtzberg is, for me and my fellow Chabad emissaries throughout the world, a personal grief.

This display of the worst element in humanity, shattering the lives of some of the best, including the Rabbi and his wife, is demoralizing.

At a time like this, no one can, or should, look for any answers where there are none. We don't begin to understand G-d's ways, nor are we expected to.

However, we do know that it is precisely at a time like this that we must affirm our faith and resolutely increase our actions of goodness and kindness. Wanton hate must be countered with wanton love.

In the last few days I received dozens of phone calls and e-mails, many inquiring about the Holtzbergs. Everyone wants to know, "What were they doing there?"

The short answer is, in 2003, they volunteered to open a Chabad House there. The long answer is, they realized that in Mumbai, there are many Jewish people who pass through on a regular basis, many of whom may not have a place to turn to do a Mitzvah, eat Kosher and celebrate Shabbat -- to find community and friendship.

So these two heroes, these sublime souls, left their friends and families and moved to India to run the Chabad House.

They knew the dangers. They knew the discomforts. But the world must be changed, and to Rabbi and Rivkah Holtzberg, it was worth their lifestyle, their social circle and, ultimately, their lives.

As their son Moshe (who was miraculously saved by his heroic nanny) begins his third year of life, we realize that G-d alone can restore the light of his life, and comfort him and the rest of this aching world.

Until He does that, we must continue their life's work. They deserve no less.

Jewish tradition teaches of the need to respond to darkness with light. The world saw great darkness last week, in brutal and senseless acts of violence that numb both mind and spirit.

In the memory of those who perished and in response to the incredible darkness, we must resolve to bring more light into the world. We must commit ourselves to more acts of goodness and kindness towards others.

We must show the world that we are stronger than those that try to destroy us and our way of life.

This idea was actualized last Friday night in Mumbai. While the Chabad House was still held hostage by the terrorists, another Chabad Rabbi was holding a Shabbat dinner for tens of Jews from across the world, at another safe location just down the block.

For me, this was the most encouraging message: Goodness will prevail!

Talk is cheap. Every good feeling must find its way into action. Visit www.jewishbuffs.com to learn more about Gabi and Rivky Holtzberg and what you can do now to honor their memory.

Rabbi Yisroel Wilhelm is the director of Chabad at University of Colorado.