The cosmos is 93 billion light-years across, with perhaps 2 trillion galaxies each containing hundreds of billions of stars and, as we can now be pretty sure, hundreds of billions of planets. And yet still we see and hear nothing. There seems to be only what the French mathematician and physicist Blaise Pascal called “the eternal silence of these infinite spaces.” Extraterrestrial life, if it exists, is either very well hidden or just too far away in time and space.
Suppose God just wanted to give us an idea of infinity and the rareness and preciousness of life. Perhaps Earth and its inhabitants together serve as a perspective figure.