I think the problem is looking at expectations as arrogance. Not to get offensive, that's not my intention, but it seems like you're stereotyping all of believing as imposing a persons will over God's. God's going to do what God's going to do. If your prayers line up according to what He is willing and able to do, why wouldn't He provide for you. I think that's the problem in this conversation; one must know what is available and ask and expect. Yes, sacrifices must be made at times but they must be made with a whole heart or they are worthless, it is not through works that we are saved but grace and grace alone. Also, as for monks and nuns, sincerity does not guarantee truth. Seclusion from the world does not help anyone, we should not be of this world but we sure do live in it and have to deal with it on a daily basis in order to survive.