5 We would now say somewhat concerning the Holy Ghost; not to declare His substance with exactness, for this were impossible; but to speak of the diverse mistakes of some concerning him, lest from ignorance we should fall into them; and to block up the paths of error, that we may journey on the King's one highway. And if we now for caution's sake repeat any statement of the heretics, let it recoil on their heads, and may we be guiltless, both we who speak, and you who hear.
Source: Catechetical Lectures (New Advent)