We need to learn to thank the Lord for closed doors just as much as we do for open doors. The reason God closes doors is because He has not prepared anything over there for us.

If he didn't close the wrong door we would never find our way to the right door. Even when we don't realize it, God directs our paths through the closing and opening of doors. When one door closes, it forces us to change our course. Another door closes; it forces us to change our course yet again..