The mind trusts only the causes it can watch unfold: the visible wind, the falling rain. It wants to trace exactly how the good will come before it will believe the good is near. And so it misses what already moves underneath.
Still, the valley fills anyway. Life gives through channels the thinking mind cannot follow. When a person stops demanding to see the mechanism and stays open in the present, the water is found gathering quietly in the low places. The supply was flowing all along, while the eyes kept searching the empty sky.