How does a tiny invisible soul use the big body?

If we suppose that the soul is tiny thing that resides in the body then question arises that ‘How does a tiny invisible use the big body?’, but it is not a very complex question to explain.
Some times I wonder how one driver pulls the big train. Best example is railway; we can see that only one man can move about 10 to 40 bogies at a time. But you know the truth; no man can pull this much of load by himself. It is the engine that pulls the load. Without the engine no driver can pull the train.
Then, what about our body? Could there be such a thing with the soul too? We call this engine our mind. Means the soul drives the mind and mind drives the body. You may say that in some countries trains have no drivers. Maybe, that train didn’t have a driver. But that train will definitely have its control station where there will be a human being to control the movements of the train. This is true even with complex robots. So it is clear that we are bundle of the body, mind and soul like car, engine and driver. Finally, it means that: the body can be seen. With the mind we think. And the soul really makes us feel joy & pain.
When we eat ice cream, tongue buds sense its sweet taste and inform the mind. The mind then relays the taste of the ice cream to the soul. The soul finally feels good. The soul is the real ‘I’ who feels good when I eat ice cream. It feels good because it is a conscious thing. It is made impossible with body and mind. Since the soul is so tiny, the mind too must be tiny. It’s not easy to know the great powers that the mind has. And, all this is true even though it’s very tiny. We can understand it with the example; today’s computers are one type of wonder. A small disk has several GB of memory. But human being is the greatest miracle. Our mind has tremendous memory and an incredible speed.
But the soul is the still greater wonder – a tiny thing that never dies and is conscious.
That means that all the wonders of a living being are basically the properties of the soul.