43. It is a rule of the Lord's providence and order that the more a person's thinking and willing comes from heaven, the more the spiritual internal man is opened up and developed. This opening leads into heaven, even as far as the Lord, and the development is in accordance with heaven's principles. But in the opposite case, the more a person's thinking and willing comes, not from heaven, but from the world, the more his spiritual internal man is closed off and the external is opened up. This opening leads to the world, and the development is in the direction of worldly matters.