The strangeness of things

Eating of the strange strong meat of reality
That strangeness of things, which is the light in all poetry, and indeed in all art, is really connected with their otherness; or what is called their objectivity. What is subjective must be stale; it is exactly what is objective that is in this imaginative manner strange. In this the great contemplative is the complete contrary of that false contemplative, the mystic who looks only into his own soul, the selfish artist who shrinks from the world and lives only in his own mind. According to St. Thomas, the mind acts freely of itself, but its freedom exactly consists in finding a way out to liberty and the light of day; to reality and the land of the living. In the subjectivist, the pressure of the world forces the imagination inwards. In the Thomist, the energy of the mind forces the imagination outwards, but because the images it seeks are real things. All their romance and glamour, so to speak, lies in the fact that they are real things; things not to be found by staring inwards at the mind. The flower is a vision because it is not only a vision. Or, if you will, it is a vision because it is not a dream. This is for the poet the strangeness of stones and trees and solid things; they are strange because they are solid. I am putting it first in the poetical manner, and indeed it needs much more technical subtlety to put it in the philosophical manner. According to Aquinas, the object becomes a part of the mind; nay, according to Aquinas, the mind actually becomes the object. But, as one commentator acutely puts it, it only becomes the object and does not create the object. In other words, the object is an object; it can and does exist outside the mind, or in the absence of the mind. And therefore it enlarges the mind of which it becomes a part. The mind conquers a new province like an emperor; but only because the mind has answered the bell like a servant. The mind has opened the doors and windows, because it is the natural activity of what is inside the house to find out what is outside the house. If the mind is sufficient to itself, it is insufficient for itself. For this feeding upon fact is itself; as an organ it has an object which is objective; this eating of the strange strong meat of reality. -- 

St. Thomas Aquinas

G. K. Chesterton