"But in all these speculations let our understanding have sufficient coherence with the rule of piety, and let us think of the Holy Spirit's words not as something that shines as a speech fashioned by frail human eloquence, but, as it is written, 'All the king's glory is within.' (Psalm 44.14 LXX - 45.13) and the treasure of divine meanings is confined, shut up within the frail vessel of the common letter (cf. 2 Cor. 4.7)."
Origen, On First Principles, "How Scripture should be understood"