Just seems that on this matter that he was able to make sense 1600 years ago of something that still confuses you today. The Bible isn’t a science textbook, and its truths are spiritual truths given by God to a primitive tribe many thousands of years ago, not scientific treatises.
There is nothing at all confusing about God creating the heavens and the earth without my assistance, and sustaining it by His Word from one day to the next, just as St. Augustine believed and taught.