Unfortunately, this world is imperfect and there are many diseases out there, but God has given us protection from all of them. We can compare it with the door of our house—we lock the doors so that no stranger can get into the house. Similarly, we need to learn how to use the Word of God to resist all diseases and infirmities and walk in divine health. And if an illness comes knocking in our house, we can shut the door and lock it securely.