Sometimes I don’t see this quote for the genius that it is. At the surface, you can see it as water being flexible. “Water becomes the cup.” However, water also does two things.
It is as powerful as it needs to be to get to where it is going - there is nothing stopping a river from flowing. Even if you dam the river - if you don’t redirect, one day, whether it is a week or a thousand years, the water will break the dam.
It is always moving. Even water in a puddle is pushing against the ground, smoothing, sanding, and digging into the world. If it finds itself unable to accomplish its task in time, it reverts into air, only to come down as rain again to try once more.
The truth is difficult to figure out. Once it is however, be prepared to find push back. Arrows will be slung at everything but that truth, but in the end, that is how you know that the truth is the truth.