Two young salmon are swimming along one day. As they do, they are passed by a wiser, older fish coming the other way. The wiser fish greets the two as he passes, saying, "Morning boys, how's the water?" The other two continue to swim in silence for a little while, until the first one turns to the other and asks, "What the hell is water?"
There are these two young fish swimming along and they happen to meet an older fish swimming the other way, who nods at them and says 'Morning, boys. How's the water?' And the two young fish swim on for a bit, and then eventually one of them looks over at the other and goes 'What the hell is water?'
...morning is the soul's night.