Commentaries:
The apostle Paul equates faith and obedience, or conversely, unbelief and disobedience. Unbelief and disobedience are directly linked. Unless faith motivates a person to obedience, it is not faith but merely an esoteric opinion. James corroborates exactly what the apostle Paul says: "Show me your faith without your works, and I will you show you my faith by my works. Faith without works is dead" (see James 2:17-18). It does not even exist.
What was Lot's wife's sin? She did not believe. It is that simple. She died for her lack of faith, which was revealed in her direct rebellion against the messengers of God. She looked back. The root cause of her rebellion, of her worldliness, was her unbelief. Due to her unbelief, she was not prepared to leave Sodom and did not really obey the command to leave.
John W. Ritenbaugh
Faith (Part 4)
Other commentary entries containing this verse:
Ezekiel 20:10-14
Hebrews 3:19