"I extend my deepest gratitude to our Armed Forces and first responders serving both at home and abroad in the war against terrorism"

"At times our own light goes out and is rekindled by a spark from another person. Each of us has cause to think with deep gratitude of those who have lighted the flame within us"

"Next to ingratitude the most painful thing to bear is gratitude"

"The war being fought in Afghanistan and Iraq is bringing about a fundamental change to the environment that has given rise and power to the extremists who export terrorism"

"While there's been much progress on terrorism, there's still much work to do and it is very important that the countries work together in order to address this threat together"

"The essence of all beautiful art, all great art, is gratitude"

"If future generations are to remember us more with gratitude than sorrow, we must achieve more than just the miracles of technology. We must also leave them a glimpse of the world as it was created, not just as it looked when we got through with it"

"There are minds so impatient of inferiority that their gratitude is a species of revenge, and they return benefits, not because recompense is a pleasure, but because obligation is a pain"

"Terrorism is the tactic of demanding the impossible, and demanding it at gunpoint"

"We must always remember with gratitude and admiration the first sailors who steered their vessels through storms and mists, and increased our knowledge of the lands of ice in the South"

"The war and terrorism in the Middle East, the crisis of leadership in many of the oil-supply countries in the developing world, the crisis of global warming - all these are very clearly tied to energy"