cf. from “Rockefeller Center” (1930)
The echoes of the human world, which tell
Of the low voice of love, almost unheard,
And dove-eyed pity’s murmured pain, and music,
Itself the echo of the heart, and all
That tempers or improves man’s life, now free;
And lovely apparitions,–dim at first,
Then radiant, as the mind arising bright
From the embrace of beauty (whence the forms
Of which these are the phantoms) casts on them
The gathered rays which are reality–
Shall visit us the progeny immortal
Of Painting, Sculpture, and rapt Poesy,
And arts, though unimagined, yet to be;
The wandering voices and the shadows these
Of all that man becomes, the mediators
Of that best worship, love, by him and us
Given and returned; swift shapes and sounds, which grow
More fair and soft as man grows wise and kind…
— Percy Bysshe Shelley, Prometheus Unbound