I don’t know about you, but I don’t like to have my plans interrupted. For I know the plans I have for me, plans to make me happy, very happy, and I do not want those plans interrupted. The problem, though, is that life is filled with interruptions, isn’t it? Some of them wanted, and most of them not.
Mary seems to understand a couple of things about interruptions that we don’t, and that allows her to say yes to God.