Philosophers say that you cannot step into the same stream twice. The water is different from moment to moment, which makes the river different.
Also, after you step into the stream the first time, you know there’s a stream there, so the next time you go out walking you won’t step into the stream like a goddamned fool.
Pay attention to where you’re walking! Stop staring at that iPhone and look around you! It’s beautiful out, with all the trees and birds and grass.
And the stream, dummy! Slow down, look where you’re going, and enjoy the journey for once!