Rabbi Nachman teaches,
When a person falls from his level he should know that this is sent from Heaven.
The purpose of the apparent rejection is to draw him closer. The reason for the fall is to spur the person to make even greater efforts to draw closer to God.
The thing to do is to make an entirely new start. Start serving God as if you had never started in your whole life. This is one of the most basic principles of serving God. We must literally begin all over again every day.
Likutey Moharan I, 261
With permission taken over from: Daily Dose Of Rabbi Nachman