الكسب واقع بالآلة، والخلق لا بالآلة
Acquisition occurs with a granted capacity or instrument; divine creation is not dependent on a created instrument.
Here instrument points to the servant's created ability and the ordinary means through which conduct occurs. Hands, bodily faculties, and intention matter for the human performance of an action, but they do not make the person an independent source of existence.
The distinction between a customary means and an independent creator is helpful. Something may ordinarily occur through an instrument without that instrument possessing self-sufficient creative power.