quality. It makes us wonder, as well, whether what has been added is essential to God’s being or merely accidental. If essential, then how did God exist without it? Here is the bottom line: if God is not simple, then he is made up of parts, and to consist of parts is to be divisible, by having those parts subtracted or new parts added. Either way, God’s being changes in the process. Immutability is key to preserving God’s simplicity.