Change based on principle is progress. Constant change without principle becomes chaos.

The past sharpens perspective, warns against pitfalls, and helps to point the way.

If our founding fathers were alive today, they'd roll over in their graves.

The search for a scapegoat is the easiest of all hunting expeditions.

Pessimism never won any battle.

The opportunist thinks of me and today. The statesman thinks of us and tomorrow.

Any man who wants to be president is either an egomaniac or crazy.

You don't lead by hitting people over the head - that's assault, not leadership.

We will bankrupt ourselves in the vain search for absolute security.

May we never confuse honest dissent with disloyal subversion.

Accomplishment will prove to be a journey, not a destination.

Never waste a minute thinking about people you don't like.

History does not long entrust the care of freedom to the weak or the timid.

A people that values its privileges above its principles soon loses both.

The supreme quality of leadership is integrity.

We the people, elect leaders not to rule but to serve

...from the same principles, I now demonstrate the frame of the System of the World.

Therefore, the causes assigned to natural effects of the same kind must be, so far as possible, the same.

Therefore to the same natural effects, we must, as far as possible, assign the same causes.