It's an expression. Liquid water has mass and takes up space. It's material. It exists in a materialistic universe where the only things that exist are matter a

It's an expression. Liquid water has mass and takes up space. It's material. It exists in a materialistic universe where the only things that exist are matter an energy. On the other hand, there's nothing physical about "laws." They lose their law-like properties and become conventions of thought rather than regulators of truth and rationality in a world where only matter and energy exist.