For that moment I touched an emotion beyond the common range of men, yet one the poor brutes we dominate know only too well. I felt as a rabbit might feel returning to his burrow, and suddenly confronted by the work of a dozen busy navvies digging the foundations of a house. I felt the first inkling of a thing that presently grew quite clear in my mind, that oppressed me for many days, a sense of dethronement, a persuasion that I was no longer master, but an animal among animals; under the Martian heel.

H.G. Wells

Feel free to vote up the quotes in the comments that you like the most. Vote them all up if you like them equally :)