Your personal statement should NOT be a summary of everything that comes after it in the biosketch document.
It may seem intuitive to use the first paragraph on the page to provide an overview of what is to follow. After all, this is what is expected of you in other sections of the proposal. However, you are missing a serious opportunity to sell yourself if you only reiterate your degrees and past grant awards. Reviewers should come away from your personal statement feeling as though they understand you as a scientist - your motivations, the questions that drive your passions, and the expertise you offer that makes you the perfect person for this project. A list of your degrees will not serve this purpose. Take a lesson from some of the more aggressive infomercials on television, and sell yourself in a way that is convincing and persuasive. Here is some inspiration from Pajama Jeans: