In a time of turbulence and change, it is more true than ever that knowledge is power.

For man holds in his mortal hands the power to abolish all forms of human poverty and all forms of human life. And yet the same revolutionary beliefs for which our forebears fought are still at issue around the globe -- the belief that the rights of man come not from the generosity of the state, but from the hand of God.

Be aware of danger-but recognize the opportunity

At the start of 2005 the idea of downloading a song to a mobile phone was an idea, by the end of the year it was a reality.

Some of my colleagues who are criticized today for lack of forthright principles-or who are looked upon with scorn as compromising "politicians"-are simply engaged in the fine art of conciliating, balancing and interpreting the forces and factions of public opinion, an art essential to keeping our nation united and enabling our Government to function.

So let us persevere. Peace need not be impracticable, and war need not be inevitable. By defining our goal more clearly, by making it seem more manageable and less remote, we can help all peoples to see it, to draw hope from it, and to move irresistibly toward it.

But I think the American people expect more from us than cries of indignation and attack. The times are too grave, the challenge too urgent, and the stakes too high to permit the customary passions of political debate. We are not here to curse the darkness, but to light the candle that can guide us through that darkness to a safe and sane future. As Winston Churchill said on taking office some twenty years ago: if we open a quarrel between the present and the past, we shall be in danger of losing the future.