It's rude to stare," said the troll. Its mouth opened with a little crest of foam, and shut again in exactly the same way that water closes over a stone. "Is it? Why?" asked Rincewind. How does he hold himself together, his mind screamed at him. Why doesn't he spill? - Terry Pratchett
There's a race of men that don't fit in, A race that can't sit still;So they break the hearts of kith and kin, And they roam the world at will.They range the field and rove the flood, And they climb the mountain's crest; Their's is the curse of the gypsy blood, And they don't know how to rest. - Robert W. Service
I've dropped my pebble in the ocean, and hopefully; throughout the course of the day; millions of others will drop theirs in too. No single one of us knows which pebble causes the wave to crest, but each of us, quite rightly, believes that it might be ours; an act of faith. - Michael J. Fox
They were the men and the women of the sand, of the wind, of the light, of the night. They appeared as in a dream, at the crest of a dune, as if they were born of the cloudless sky. - Jean-Marie G. Le Clézio
Time is a wave or a black hole could not bend it; humanity rides the crest of an infinite number of waves that are perceived as linear in their limited frame of reference. - Ken Poirot