Carl Sagan Quote

The Apollo pictures of the whole Earth conveyed to multitudes something well known to astronomers: On the scale of the worlds - to say nothing of stars or galaxies - humans are inconsequential, a thin film of life on an obscure and solitary lump of rock and metal

Pale Blue Dot: A Vision of the Human Future in Space (ed. Ballantine Books, 2011) - ISBN: 9780307801012