God wants us to obey not just things we are able to obey, but also to obey things that seem impossible to obey. This is true obedience and it is, in other words, to obey things we cant do by ourselves except by faith. In fact, many things look impossible in the sight of men because they cant be seen as God sees them. In Mark 9:23 reads, Jesus said, "If You can? All things are possible to him who believes." It is not us but God that makes them possible.