“There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.”

We are like butterflies who flutter for a day and think it is forever.

Science is a way of thinking much more than it is a body of knowledge.

Those at too great a distance may, I am well are, mistake ignorance for perspective.

Arguments from authority carry little weight, authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.

Other things being equal, it is better to be smart than to be stupid.

I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.

Don’t judge everyone else by your own limited experience.

The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.

People are not stupid. They believe things for reasons.

There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.

Stars are phoenixes, rising from their own ashes.

There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.

Stars are phoenixes, rising from their own ashes.

The cure for a fallacious argument is a better argument, not the suppression of ideas.

Where we have strong emotions, we’re liable to fool ourselves.

Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.