I was watching the film Salmon Fishing in the Yemen during the holidays when I came across the following speech made by a Yemeni Sheikh to a English civil servant whose hobby is angling, “How many hours do you fish before you catch something? Is that a good use of your time for a facts and figures man? But you persist, in the wind and the rain and the cold. With such poor odds of success, why? Because you are a man of faith and, in the end, you are rewarded for your faith and constancy with a fish.” So in invitation you may have prayed for the same person over a number of years, keep on praying and invite again as prompted by God.