"As he is one, so we call Him God, the Deity, the Divine Nature, and other names of the same signification"

This quote by John Hales is describing the idea of monotheism, or the belief in one God. Hales is suggesting that, given that there is just one God, we describe Him by several names. These names, such as God, Deity, and Divine Nature, all have the same meaning and describe the very same being. Hales is emphasizing the importance of acknowledging the singularity of God, and that all of the various names we use to refer to Him are merely various methods of expressing the exact same concept. This quote is a reminder that, despite the numerous different names we use to describe God, He is still the very same being. It is a pointer that, no matter what name we utilize, we are still referring to the very same God.