If you move on through the rain, the lyrics suggest, sunshine will be there after a while. They encourage you to find ways to make the life of your loved one count. By letting the good memories of their life make your life more colorful and bright, you will, in turn, illuminate the lives of those around you. In this way, even though it’s hard to fathom while it’s raining, while you are mourning, while you can barely bring yourself to say goodbye, the sunshine will come. You just need to keep going.