9 He cannot be seen— He is too bright for vision; nor comprehended— He is too pure for our discernment; nor estimated— He is too great for our perception; and therefore we are only worthily estimating Him when we say that He is inconceivable. But what temple can God have, whose temple is the whole world? And while man dwells far and wide, shall I shut up the power of such great majesty within one small building? He must be dedicated in our mind; in our breast He must be consecrated. Neither must you ask the name of God. God is His name. Among those there is need of names where a multitude is to he distinguished by the appropriate characteristics of appellations. To God who alone is, belongs the whole name of God; therefore He is one, and He in His entirety is everywhere diffused. For even the common people in many things naturally confess God, when their mind and soul are admonished of their author and origin. We frequently hear it said, “O God,” and “God sees,” and “I commend to God,” and “God give you,” and “as God will,” and “if God should grant;”and this is the very height of sinfulness, to refuse to acknowledge Him whom you cannot but know.
Source: The Treatises of Cyprian (New Advent)