This is an attempt to piece together different but related material to do with the cosmos, the enormity of it, our achievements so far in exploring its vast distances, and finally some sense of what it all means.
First, the day the earth smiled
Second, it's worth listening to the interview with Carolyn Porco – leader of the Cassini Imaging Science team:
Then third, the picture - taken from all of billion miles away. Think about that for a second…
Finally, Carl Sagan himself. If this doesn't make you sit up and take note, I'm not sure anything else ever could.