There is nothing more certain and unchanging than uncertainty and change.

Nothing compares to the simple pleasure of a bike ride.

We, the people, are the boss, and we will get the kind of political leadership, be it good or bad, that we demand and deserve.

Great crises produce great men, and great deeds of courage.

Remember that our nation's first great leaders were also our first great scholars.

The very word Secrecy is repugnant in a free and open society.

Those who came before us made certain that this country rode the first waves of the industrial revolution, the first waves of modern invention and the first wave of nuclear power. And this generation does not intend to founder in the backwash of the coming age of space. We mean to be part of it-we mean to lead it.