Carl Sagan

Somewhere, something incredible is waiting to be known.

The cosmos is also within us. We are made of star-stuff. We are a way for the universe to know itself.

If you want to make an apple pie from scratch, you must first invent the universe.

Extraordinary claims require extraordinary evidence.

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

The universe is a pretty big place. If it's just us, it seems like an awful waste of space.

A book is made of paper, ink, and imagination. It is a portal to new worlds and new ideas.

We have lingered long enough on the shores of the cosmic ocean. We are ready to set sail for the stars.

The brain is a very big place in a very small space.

Science is not only compatible with spirituality; it is a profound source of spirituality.

The nuclear arms race is like two sworn enemies standing waist-deep in gasoline, one with three matches, the other with five.

If we are to survive, we must look to the stars.

Imagination will often carry us to worlds that never were. But without it, we go nowhere.

We make our world significant by the courage of our questions and the depth of our answers.

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

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

Understanding is a kind of ecstasy.

The Earth is a very small stage in a vast cosmic arena.

Look again at that dot. That's here. That's home. That's us.

For small creatures such as we the vastness is bearable only through love.