Fahrenheit 451 - Ray Bradbury

...to remind people that we're allotted a little space on earth and that we survive in that wilderness that can take back what it has given, as easily as blowing its breath on us or sending the sea to tell us we are not so big.
When we forget how close the wilderness is in the night, my grandpa said, some day it will come in and get us, for we will have forgotten how terrible and real it can be.