What it Means to "Leave" and "Forsake"
God promises to sustain you and therefore encourages you to "be strong and courageous" and to "not be afraid." One of our greatest fears is abandonment. Without support, it is very difficult to be strong and courageous. Two things God never does is: 1) Leave you, or 2) Forsake you. Unfortunately, it is something that people do all the time. T.D. Jakes suggests that to "leave" represents someone's physical departure, while "forsake" represents someone's emotional departure.
There are people who cannot be with you, but stay connected with you emotionally through alternative means of contact. Some people BOTH leave you and forsake you. It is hard to handle, especially when coming from someone who is special in your life.
However, this is why we love, follow, and relate to the Lord. He keeps all this promises!