I found this point the writer of the article made interesting:
The writer appears to state this with absolute certainty, that free will operates independently of human urges, desires, drives, and impulses. He doesn't explain how or why. Just because he said so, I guess.
This statement would also suggest that one has to assume that spirituality exists in order for conscience to exist, which is required for free will to exist.
Basically, the entire argument about free will is based on the premise that (1) God exists and (2) God is an all-powerful, all-knowing, benevolent entity who loves all humans. Without those premises, then all we have are the indifference of nature, biology, and cause-and-effect to explain human actions, defining them more objectively or clinically, not necessarily labeling them as "good" or "evil."