Knowing God Through the Year, J.I. Packer.
"If you stand at the end of the platform at York Station, you can watch a constant succession of engine and train movement that, if you are a railway enthusiast, will fascinate you. But you will only be able to form a rough idea of the overall plan.
York Station
"If, however, you are privileged to be taken into the magnificent electrical signal box that lies athwart platforms seven and eight, you will see a diagram of the entire track layout for five miles on either side of the station. At once you can look at the situation through the eyes of those who control it. You will see why this train is diverted from its normal running line and that one parked temporarily in a siding.
"Some people feel that if they were really walking close to God, so that he could impart wisdom to them freely, then they would find themselves in the York Station signal box. We might suppose that the gift of wisdom consists in an ability to see why God has done what he has done in a particular case and to see what he is going to do next. But in truth this view would be more than our human minds could comprehend. God gives us the view that we need--from the end of the platform."
J.I. Packer ~ Knowing God Through the Year
