While naturally agreeing with much of what Ryrie has to say, I found his arguments often based on logic and not Scripture. Once he defines dispensations in a certain way, he calls it a mistake on the part of anyone to hold any view that doesn't fit his definition. While I'm a firm believer in dispensational truths, I don't believe that God has given us a strict definition or that He always must operate within the system. His arguments against "ultradispensationalism" in particular, fall within this category.