I frequently hear the Montessori line "follow the child" or "teach me to do it myself". I think the best line to summarise Montessori is... believe in the child.
Today my husband took Caspar to the park near our home. I looked out our window and saw Caspar flying his kite, all by himself. I couldn't believe it. I didn't think he (or any other three year old) was able to fly a kite themselves. My husband obviously believed in Caspar when I didn't. He showed him how and gave him the opportunity, when I wouldn't have.
Don't limit your child by what you think they can or cannot do.