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.

When Kepler found his long-cherished belief did not agree with the most precise observation, he accepted the uncomfortable fact. He read more

When Kepler found his long-cherished belief did not agree with the most precise observation, he accepted the uncomfortable fact. He preferred the hard truth to his dearest illusions; that is the heart of science.

It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and read more

It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.

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

The surface of the Earth is the shore of the cosmic ocean. From it we have learned most of what read more

The surface of the Earth is the shore of the cosmic ocean. From it we have learned most of what we know. Recently, we have waded a little out to sea, enough to dampen our toes or, at most, wet our ankles. The water seems inviting. The ocean calls. So