After my wife Shoshana and our unborn son were murdered by a suicide bomber August 9, 2001 at Jerusalem’s Sbarro, I have chosen to respond to terror with kindness.

I am fighting back, but not with grenades or guns. Practically and physically, our heroic soldiers work very hard to crush and deter terrorism.

But ordinary citizens can also work to spiritually overcome the evil of terrorism through acts of goodness.

I think of Shoshana, my wife of 15 months, every day, but my quest for kindness helps me live through the pain and loss. It's affecting people all over the world of all religions. I am fighting hatred with kindness, one person at a time. That gives me tremendous strength.

Shoshana was five months pregnant when she was invited to a program in Israel as part of her master's degree in education. Shoshana just loved Israel.

Kindness was what Shoshana was all about. At the Long Beach school where she taught, Shoshana always greeted her students with a big smile that made them feel important. She connected with every student, and filled the world with a smile that radiated her love.

Shoshana’s death directed me to promote kindness through the internet. We now have more than 5,000 subscribers on six continents to our "Daily Dose of Kindness" e-mail. Everyone who signs up is also an advisor. I like having many advisors. Readers, including some in Iran, Kuwait, and Japan, report their acts of kindness to our Web site.

My kindness campaign sure caught on at New York City Transit, where I work as a computer specialist. I initiated a kindness public awareness campaign among employees, and a "Heroes of Kindness" posters program depicting NYC Transit employees and passengers performing inspiring acts of kindness to be plastered throughout the system. What better place to get the attention of millions of New Yorkers?

Paul Fleuranges, vice president of public affairs at NYC Transit notes the dramatic impact. "We featured Greenbaum in our newsletter and have his posters up throughout the building promoting his message of kindness."

Repeating stories of good deeds inspires others. It's contagious! Schools, organizations, and radio programs worldwide have taken up the cause.

At my Manhattan office each day, I greet everyone jubilantly. When they ask why I’m so happy, I say, "Because it makes you live longer." This usually makes them smile, too.

Last week, one Kindness advisor sent me a link to New York Times article that medical research found that a kindness act stimulates the same place in the brain that physical pleasures do. Doing kindness actually causes enjoyment! I cope with my loss through the pleasure of promoting kindness.

Our hormonal system has actual biochemical responses even though the victory is a figment of our imagination.

It's very therapeutic. I come home from work and go straight to the computer. My readers give me tremendous feedback, saying how it inspires them.

Fayge Young, from Oak Park, MI, calls the e-mailings "my daily booster shot to keep me upbeat. If someone in Greenbaum's situation can have the kindness energy, I can draw on the same kind of power." People in Israel tell me that my e-mails are very comforting, especially in these stressful times.

Personally I serve as a "Big Brother" for children from broken homes, providing computer training for the unemployed, and I regularly visit nursing homes.

Zelig Pliskin’s book “Kindness,” is my favorite, offering eighty-five techniques to find opportunities to do kindness by improving yourself and the world around you. He explains how you can feel the thrill of an international sports victory every day if you visualize 100,000 people applauding and cheering you on when you do kindness. Like music or art, kindness, too, requires practice.

After my wife’s death, I prayed to G-d to help me to make the world better. The feedback I get from the kindness project shows that my prayers are being answered.

A rabbi told me, "Sometimes you only see the knots on the back of a carpet. But later you see the beautiful design on the front." I try to look forward to see the bigger and better picture.