The fall left the human will intact insofar as we still have the faculty of choosing. Our minds have been darkened by sin and our desires bound by the wicked impulses. But we can still think, choose and act. Yet something terrible has happened to us. We have lost all desire for God. The thoughts and desires of our heart are only evil continuously. The freedom of our will is a curse. Because we can still choose according to our desires, we choose to sin and thus we become accountable to the judgment of God.