Authority

I am reading a book on prayer and one of the chapters talks about spiritual authority. This is very interesting to me because at times I really don't know what I have authority over. I'm going to have to reread this chapter because I am still not exactly clear on that. It did make me think of something that may be similar, though.
When Halle was little she used my bathroom for everything. We have a garden tub so she liked to take her baths in the "big" tub. She brushed her teeth, combed her hair (on the rare occasions she combed that curly mop), and did all her bathroom duties in my bathroom. On one trip to Pensacola when Halle was about 5, she noticed that all my sister's kids had their own bathrooms. During the car ride home, she said to me how she wished she had her own bathroom. I told her she did, that the bathroom Kenzie and Brandt used was hers too. She said, "Really?" I assured her that, yes, that bathroom was just as much hers as it was theirs and that was the end of that conversation. I didn't think much about it partially because Halle and I have SO many conversations about so many things- she is a chatter. But a day or so after we were home- Halle moved her toothbrush, shampoo and conditioner, and her rarely-used hair brush into the kid's bathroom and sat them in drawers and on the side of the tub. She moved in to that bathroom. She never mentioned it to me beforehand to make sure it was okay, and she didn't ask Kenzie and Brandt if they minded. Mom said it was her bathroom, so in her precious little mind- it was HER bathroom.
I think when Jesus talked about coming to Him like little children- this was some of what He was talking about. Oh to have the faith of Halle in what He tells me is mine- what He says I can do! To not look for the approval of man to see if it is acceptable-to not live in perpetual insecurity about whether I misunderstood what He told me. This is the kind of spiritual authority I want to walk in- not presumption or arrogance, not double-minded insecurity...but simple faith that what He says is true and what He tells me to do- I can do.