Dr. Carl Sagan

Never utter these words: 'I do not know this, therefore it is false.' One must study to know; know to read more

Never utter these words: 'I do not know this, therefore it is false.' One must study to know; know to understand; understand to judge.

Somewhere, something incredible is waiting to be known.

Somewhere, something incredible is waiting to be known.

You have to know the past to understand the present.

You have to know the past to understand the present.

There are many hypotheses in science which are wrong. That's perfectly all right; they're the aperture to finding out what's read more

There are many hypotheses in science which are wrong. That's perfectly all right; they're the aperture to finding out what's right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.

I also wish that the Pledge of Allegiance were directed at the Constitution and the Bill of Rights, as it read more

I also wish that the Pledge of Allegiance were directed at the Constitution and the Bill of Rights, as it is when the President takes his oath of office, rather than to the flag and the nation