Calvinists also believe that all who are born again and justified before God necessarily and inexorably proceed to sanctification. Failure to proceed to sanctification in their view is considered by some as evidence that the person in question was never truly saved to begin with. Proponents of this doctrine distinguish between an action and the consequences of an action, and suggest that after God has regenerated someone, the person's will has been changed, that "old things pass away" and "all things are become new", as it is written in the Bible, and he or she will as a consequence persevere in the faith.