Excerpt: Remarks by the President at a Memorial Service for the Victims of the Shooting in Tucson, Arizona

Read the excerpt from the speech. At the end, Obama says we need to "align our values with our actions." What implications does this have for the US's international relations? Be specific about which US values you are talking about.

You see, when a tragedy like this strikes, it is part of our nature to demand explanations –- to try and pose some order on the chaos and make sense out of that which seems senseless. Already we’ve seen a national conversation commence, not only about the motivations behind these killings, but about everything from the merits of gun safety laws to the adequacy of our mental health system. And much of this process, of debating what might be done to prevent such tragedies in the future, is an essential ingredient in our exercise of self-government.

But at a time when our discourse has become so sharply polarized -– at a time when we are far too eager to lay the blame for all that ails the world at the feet of those who happen to think differently than we do -– it’s important for us to pause for a moment and make sure that we’re talking with each other in a way that heals, not in a way that wounds.

Scripture tells us that there is evil in the world, and that terrible things happen for reasons that defy human understanding. In the words of Job, “When I looked for light, then came darkness.” Bad things happen, and we have to guard against simple explanations in the aftermath.

For the truth is none of us can know exactly what triggered this vicious attack. None of us can know with any certainty what might have stopped these shots from being fired, or what thoughts lurked in the inner recesses of a violent man’s mind. Yes, we have to examine all the facts behind this tragedy. We cannot and will not be passive in the face of such violence. We should be willing to challenge old assumptions in order to lessen the prospects of such violence in the future. But what we cannot do is use this tragedy as one more occasion to turn on each other. That we cannot do. That we cannot do.

As we discuss these issues, let each of us do so with a good dose of humility. Rather than pointing fingers or assigning blame, let’s use this occasion to expand our moral imaginations, to listen to each other more carefully, to sharpen our instincts for empathy and remind ourselves of all the ways that our hopes and dreams are bound together.

After all, that’s what most of us do when we lose somebody in our family -– especially if the loss is unexpected. We’re shaken out of our routines. We’re forced to look inward. We reflect on the past: Did we spend enough time with an aging parent, we wonder. Did we express our gratitude for all the sacrifices that they made for us? Did we tell a spouse just how desperately we loved them, not just once in a while but every single day?

So sudden loss causes us to look backward -– but it also forces us to look forward; to reflect on the present and the future, on the manner in which we live our lives and nurture our relationships with those who are still with us.

We may ask ourselves if we’ve shown enough kindness and generosity and compassion to the people in our lives. Perhaps we question whether we're doing right by our children, or our community, whether our priorities are in order.

We recognize our own mortality, and we are reminded that in the fleeting time we have on this Earth, what matters is not wealth, or status, or power, or fame -– but rather, how well we have loved -- and what small part we have played in making the lives of other people better.

And that process -- that process of reflection, of making sure we align our values with our actions –- that, I believe, is what a tragedy like this requires.