The waves may break upon the mountain, yet still they come, wave upon wave, and in the end only pebbles remain where once the mountain stood

The waves may break upon the mountain, yet still they come, wave upon wave, and in the end only pebbles remain where once the mountain stood. And soon even the pebbles are swept away, to be ground beneath the sea for all eternity.

George R. R. Martin, A Feast for Crows (A Song of Ice and Fire, Book 4)