I love Carl Sagan, so for me this book is partially about finishing the canon of his works, and also partially to try and wrap my head around a scientific view of religious experience. If that floats your boat, you'll find this valuable, though not as amazing as his other works.
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Love, love, love this book. Sagan encourages skeptical thinking as a way to avoid bullshit and the manipulative hold of charlatans. I wish this was required reading in our schools and churches, truly would protect a lot of people.
Sobering reflection on how inconsequential we are, populating just one tiny planet in the vast cosmos. But hey, reality check! He then paints a humanistic future, love Carl.