I am honoured and humbled to stand here, where so many of America's leaders have come before me, and so many will follow.

I am honoured and humbled to stand here, where so many of America's leaders have come before me, and so many will follow.

We have a place, all of us, in a long story - a story we continue, but whose end we will not see. It is the story of a new world that became a friend and liberator of the old, a story of a slave-holding society that became a servant of freedom, the story of a power that went into the world to protect but not possess, to defend but not to conquer.

It is the American story - a story of flawed and fallible people, united across the generations by grand and enduring ideals.

The grandest of these ideals is an unfolding American promise that everyone belongs, that everyone deserves a chance, that no insignificant person was ever born.

Our democratic faith is more than the creed of our country, it is the inborn hope of our humanity, an ideal we carry but do not own, a trust we bear and pass along. And even after nearly 225 years, we have a long way yet to travel.

While many of our citizens prosper, others doubt the promise, even the justice, of our own country. The ambitions of some Americans are limited by failing schools and hidden prejudice and the circumstances of their birth. And sometimes, our differences run so deep it seems we share a continent, but not a country.

We do not accept this, and we will not allow it. Our unity, our union, is the serious work of leaders and citizens in every generation. And this is my solemn pledge: I will work to build a single nation of justice and opportunity. I know this is in our reach because we are guided by a power larger than ourselves who creates us equal in His image.

America has never been united by blood or birth or soil. We are bound by ideals that move us beyond our backgrounds, lift us above our interests and teach us what it means to be citizens. And every immigrant, by embracing these ideals, makes our country more, not less, American.

Today, we affirm a new commitment to live out our nation's promise through civility, courage, compassion and character.

Our national courage has been clear in times of depression and war, when defending common dangers defined our common good. We will build our defences beyond challenge, lest weakness invite challenge. We will confront weapons of mass destruction, so that a new century is spared new horrors. The enemies of liberty and our country should make no mistake: America remains engaged in the world by history and by choice, shaping a balance of power that favours freedom.

America, at its best, is compassionate. What you do is as important as anything government does. I ask you to seek a common good beyond your comfort; to defend needed reforms against easy attacks; to serve your nation, beginning with your neighbour. I ask you to be citizens: citizens, not spectators; citizens, not subjects; responsible citizens, building communities of service and a nation of character.

After the Declaration of Independence was signed, Virginia statesman John Page wrote to Thomas Jefferson: "We know the race is not to the swift nor the battle to the strong. Do you not think an angel rides in the whirlwind and directs this storm?"

Much time has passed since Jefferson arrived for his inauguration. But the themes of this day he would know. We are not this story's author, who fills time and eternity with his purpose. Yet his purpose is achieved in our duty, and our duty is fulfilled in service to one another. Never tiring, never yielding, never finishing, we renew that purpose today, to make our country more just and generous, to affirm the dignity of our lives and every life.

This work continues. This story goes on. And an angel still rides in the whirlwind and directs this storm. God bless you all, and God bless America.