simple expression

Here is Gerard Manly Hopkins in an essay from 1864, "On the Origins of Beauty," writing about a poem he likes:

"...it is not the power of the writer I am impressed with...nor is it the nobleness of the thoughts or the splendor of the images brought forward, which might except for their concentration and elaboration perhaps have bee put into prose; but I seem to see that the author has put things before him in a light that is precisely that of poetry, that he is an absolute and unembarrassed instance of a poet, or if we may put it another way that he is a workman come from his apprenticeship with the Muses skilled to perfection in his trade and having made himself master of all that the science has to give him. The poem is artificial, you see, but with that exquisite artifice which does not in truth belong to artifice but to simple expression...it was what a poet expressed as a poet, in the transparent, almost spontaneous, artifice which alone can make a genuinely simple subject palatable."