A crane stands in the river, doesn’t move much. A lot of waiting. There are fish, but not enough to swoop down and expect immediate gratification. A crane waits in the river, staring at the river. Sometimes distracted. It’s not a machine.
One could stare at the river for a fish. Clear flowing river until fish. Simple. Exact. The clarity depends upon the concentration. If you become good at concentrating, you are good at catching the fish. If the goal is the fish, then you are a success. If the goal is something else other than that fish, then you are completely lost. If there is no goal, then it really doesn’t matter.
So the question is, what do you want to do?
I wonder if the crane knows that there is a family of fish about ten meters behind him under the bridge.