He belongs to God and everything he does and does not do is affirmation or denial of his belonging to God. His behavior is directed by his own will so that he shall become what God has meant him to be and wants him to be. Every act for him is either realization of his real being, or its denial. Then he goes astray and cannot reach his ultimate goal. The pious person lives with a demand.
Every demand comes to man from the outside.
Also, the religious demand has not been put there by man himself, but was there from his beginning, from creation, which means something has a plan for him. What is demanded of him is precisely his own being. The typical quality of the religious demand is that what is demanded is not something strange, but it is himself. It is not how he is, but how he should be. Demand always means that something has to be what does not yet exist.