We meant to change a nation, and instead, we changed a world.

I don't know why anyone would want to study the expansion of the universe.

The societies which have achieved the most spectacular broad-based economic progress in the shortest period of time are not the most tightly controlled, not necessarily the biggest in size, or the wealthiest in natural resources. No, what unites them all is their willingness to believe in the magic of the marketplace.

We should never fear to negotiate, nor negotiate from fear.

We will never disarm any American who seeks to protect his or her family from fear and harm.

When you start talking about government as 'we' instead of 'they,' you have been in office too long.

God's miracles are to be found in nature itself; the wind and waves, the wood that becomes a tree - all of these are explained biologically, but behind them is the hand of God.