Can someone explain to me simply what Divine simplicity is?

I have an essay due with the question 'Analyse what Aquinas means by the simplicity of God. Explain the philosophical
Challenges that are faced by this idea, and evaluate how well it can be defended.' I have no idea where to start or what to read.
Asked Aug 28, 2013

TIP: If it's not your answer to this question, please click "Leave a Comment" button under the question to communicate with the question owner.