Our lives are waves.

Our lives are waves that come up out of the ocean of eternity, break upon the beach of earth, and lapse back to the ocean of eternity. Some are sunlit, some run in storm and rain; one is a quiet ripple, another is a thunderous breaker; and once in many centuries comes a great tidal wave that sweeps over a continent; but all go back to the sea and lie equally level there.
— Austin O’Malley