Mary actually says i saved her life today. she is reffering to elizabeth saying her name was mentioned by the afflicted girls and she is saying she spoke words that supported elizabeth in not bein a witch
The thought is this: A child saved is a soul saved. A child saved is also a life saved because they have their life to live for God. An adult saved is a soul saved. An adult saved is only a partial life saved because they've already lived some of their life.