Two weeks ago, America witnessed a historic event. Tens of thousands of people gathered in Washington, D.C. for the 44th annual March for Life and heard from the highest ranking White House official to ever grace the March for Life stage – Vice President Mike Pence, along with top-ranking WH official Kellyanne Conway.

The day was a bit of a blur for those of us who were there, but in reflecting back on that historic event two weeks ago, I am reminded of the critical theme that we chose this year for the March for Life – "The Power of One."

This year's theme was conceived one night early last Spring during a "Tenebrae" service at St. Matthew's Cathedral in Washington D.C. The service, which means "shadows" in Latin, falls within the context of Holy Week, when Christians worldwide celebrate the Lord's Supper, the passion, death and ultimately resurrection of Jesus on Easter Sunday.

At one point within the service, all of the lights in the cathedral except one – a candelabra with eight candles lit on the altar – are out. As meaningful lamentations from the Old Testament are read, one by one, each of the eight candles are snuffed out until the entire cathedral is pitch black. The darkness is stark and uncomfortable, but then everything changes. A single candle at the very top is lit, symbolizing Christ. It is notable and surprising how that one little candle creates an enormously different environment than the darkness. Literally, every square foot of that cathedral was touched by a little bit of light, and that little bit of light changed everything.   

"Even the smallest person can change the course of history" is a powerful line from Tolkien's Lord of the Rings trilogy and this line truly encapsulates "The Power of One" theme.  

Working to build a culture of life can sometimes feel like we are working and living in the darkness. I experienced that darkness back in June, one day after the Supreme Court made two life issues-related decisions: The first essentially gave abortion clinics a pass, and decided to treat them differently than other outpatient facilities with regard to health standards and regulations. In the second ruling, a family pharmacy from Washington State, after battling for many years, was told that they either had to violate their consciences by filling life-destructive drug prescriptions or close up their business.

As a pro-life American who doesn't identify with either political party, approaching the close of difficult years with the Obama Administration on life and religious freedom issues, these decisions were somewhat of a final blow as we looked towards possible continuation of such policies over coming years.

But as I reflected on those two decisions and the other trials that our nation was facing, I was reminded of that little candle and the power it had to light the entire cathedral. I had to remember that no matter who is President, who is in Congress or what Supreme Court decisions are made – as significant as they are – every single one of us has the power to make a change in this world, and there is always hope. Thus, the theme of this year's March for Life was born.

On Jan. 22, Americans from every inch of this country gathered in our nation's capital for the historic 44th annual March for Life, not only to commemorate that dark day when Roe v Wade legalized abortion in our nation, but also to celebrate life and the countless lives saved throughout the years since abortion was legalized.

The speakers for this year's March for Life embodied "The Power of One" theme in a way I could have never imagined. Vice President Mike Pence joined us as the first-ever vice president to address the March for Life, alongside top White House adviser Kellyanne Conway – both of whom are inspiring role models, exemplifying how one person can truly change the world.

Abby Johnson shared her story of being a former Planned Parenthood director who became an outspoken pro-life advocate and founder of "And Then There Were None." Benjamin Watson spoke about his life outside of the NFL as a father of five, a strong Christian, and a pro-life advocate in the public square. The youth presence at the March for Life is always incredible and this year we were thrilled to hear from Katrina Gallic, a student at the University of Mary. She spoke about the many buses her school brings every year to the March for Life and how, despite the blizzard of 2016, they continued as witnesses to life; even after getting snowed in on the Pennsylvania turnpike.

The March for Life is made up of tens of thousands of people who have the capacity to be the candle in a world that sometimes feels dark. This is the true power of one – every person has the power to be a light in this often dark world. We've been marching strong for 44 years, and this year, more than ever, there is so much opportunity for change. We will continue to march until a culture of life and respect has been restored in the United States; a culture where abortion is unthinkable and the inherent dignity of the human person is respected from conception to death.

*Jeanne Mancini is the President of the March for Life.