And its push into VR—which Mr Zuckerberg sees as a stepping stone to augmented reality (AR), where information is superimposed on the real world—pits it against formidable rivals, too.
That's why Lou calls Little Italy a stepping stone, an experience that helps you achieve something else, like a real stepping stone helps you cross a river.
When the wind becomes the force that drives us forward, when the rocks on the road become stepping stones to the highest podium, nothing can stop us as long as we have the courage to restart and keep fighting.
Perhaps the most terrible part about destroying the moon for us in the present, would be robbing us of our stepping-stone out into the rest of the universe.
On the left-hand side of the fireplace, there was a plaque whereupon a young lady dressed in a sky-blue robe crossed, by means of well-defined stepping stones, a thin but furious stream.