Beware of false prophets, teachers, and brethren, page-135

Can a sanctified believer lose sanctification?
Now, you said a believer is justified and goes through the process of being sanctified so therefore if a sanctified believer can lose sanctification then the believer then in turn has lost justification.
Paul clearly says a sanctified believer can lose sanctification, do you agree?
If a sanctified believer can lose sanctification as Paul tells you, does that mean a justified believer loses justification?