Carl Sagan

Extinction is the rule. Survival is the exception.

Carl Sagan

Extraordinary claims demand extraordinary evidence.

Carl Sagan

For all our failings, despite our limitations and fallibilities, we humans are capable of greatness.

Carl Sagan

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

Carl Sagan

I don’t want to believe. I want to know.

Carl Sagan

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

Carl Sagan

In all our searching, the only thing we’ve found that makes the emptiness bearable is each other.

Carl Sagan

Somewhere, something incredible is waiting to be known.

Carl Sagan

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

Carl Sagan

The passion to explore is at the heart of being human.

Carl Sagan