For precisely because God is pure being— the absolute, perfect, unique, and simple being— we cannot give a definition of him. There is no genus to which he belongs as a member, and there are no specific marks of distinction whereby we can distinguish him from other beings in this genus. Even the being he has, so to speak, in common with all creatures does not pertain to him in the same sense as it does to them (univocally), but only analogically and proportionally.
Bavinck, Herman. Reformed Dogmatics : Volume 2 (p. 95). Baker Publishing Group. Kindle Edition.