You have to know the past to understand the present. -Carl Sagan

 

You have to know the past to understand the present.


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This quote is just one of 37 total Carl Sagan quotes in our collection. Carl Sagan is known for saying 'You have to know the past to understand the present.' as well as some of the following quotes.

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

Carl Sagan

Somewhere, something incredible is waiting to be known.

Carl Sagan

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

Carl Sagan

Absence of evidence is not evidence of absence.

Carl Sagan

In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams!

Carl Sagan