I don't think you would like my analogy, because it exposes the truth about block chain.
However one can comprehend Block Chain if they ever have had a bank lock box. The banker first identifies you and locates the correct key for your lock box. You produce your key and the banker puts your rented lock box on a table and leaves.
The rules of the game.
Everyone can decide who to do business with. That can be you or not as the case may be. This is of course another lock one gets past with the consent of those whom would do business with you.
So if the server on the internet decides not to do business with you. You loose access to the Block Chain.
Sad really that people don't realize this fact.