The phrase "גרזן ביד החוצב" ("an axe in the hand of the one who wields it") can be used to explain how physical phenomena in the world do not act independently but are merely instruments of Hashem's will. Just as an axe has no power or purpose on its own and can only function when directed by the person using it, so too all physical phenomena—such as the forces of nature, weather patterns, and the laws of physics—are entirely under Hashem's control.
This analogy highlights that these natural occurrences do not operate autonomously. Instead, they are tools through which Hashem enacts His divine plan. Whether it is the movement of the planets, the growth of plants, or the occurrence of natural events, they are all guided and directed by Hashem, with no independent power.
By viewing physical phenomena in this way, one recognizes that the natural world is not a random or self-sufficient system but is constantly under the precise control of Hashem. This perspective reinforces the idea that everything in the physical world is a manifestation of Hashem's will and purpose.