God’s knowledge corresponds unfailingly to what will occur. A future event contrary to that knowledge cannot be affirmed as part of the actual total reality. Yet this does not mean that every conceivable voluntary human action is internally self-contradictory.
The addressee is addressed in light of ordinary human ability and the conditions of obligation. Infallible foreknowledge of noncompliance does not by itself turn the command into a meaningless address.
Thus truth of divine knowledge, the servant's ability, and the status of religious command must remain analytically distinct.