Does diachronic faith undermine perseverance and regeneration?

A reader asks whether adopting a Federal Vision-like perspective on faith and justification can stop there. Must it not logically lead us to deny the perseverance of the saints, and in turn the Reformed understanding of regeneration? I explain why I think this is broadly mistaken.

Is it right to ask God to forgive you again and again, when he has already forgiven you on the cross?

Short answer: yes, we should continually ask God for forgiveness.