How far can trust really get you?

My employer allows me to do really anything i'd like to do in her business. I say that with an understatement, she trusts me enough to take care of her restaurant as she would. I came in to her restaurant on a whim because a friend of mine didn't believe i'd accept a job offer. I mean yeah it was just a busing job, cleaning tables and filling drinks not much but it led to more than I expected. I came in early for every shift, worked my hardest till my shift ended, and when the owner would mention needing something done I would always jump on it. I became reliable to the owner, I was her right hand guy doing anything and everything she asks. I'll be honest to everyone but my employer, I had no idea what I was doing. She'd ask me if I could fix something and I'd say of course! I do that kind of stuff for fun and in reality I was clueless. I would spend hours learning, and tinkering with what ever she needed and I surprisingly did the exact thing she wanted and more. The time I have worked there I grew this trust with my coworkers, the owner and to my surprise even the customers. I built this trust to a point where at the time I was 17 and the owner trusted me enough to handle anything and everything with out a single question to my actions or my reasons. The trust has grown since then to start allowing my to take care of her other businesses. I still find it so crazy to how far you can get off of hard work and a little bit of trust.