How does a Muslim—especially one who has repented—balance hope and fear of Allah in their life?

The servant's journey to his Lord, oscillating between fear and hope, is the correct path leading to salvation, especially for one who has transgressed against himself through sins. He should make the remembrance of these sins a motivator for increasing good deeds (the aspect of fear), and know that one who repents from a sin is like one who has no sin, and that the repentant is beloved by the Most Merciful (the aspect of hope).