Clement of Alexandria, Miscellanies 5:12, 208 AD

No one can rightly express him wholly. For on account of his greatness he is ranked as the All, and is the Father of the universe. Nor are any parts to be predicated of him. For the One is indivisible; wherefore also it is infinite, not considered with reference to inscrutability, but with reference to its being without dimensions, and not having a limit. And therefore it is without form.