You could almost envisage Shelley in a bleak oppressive setting. Ineffectual in the face of the natural elements against him, high on opiates , tormented by the death and poverty around him; looking skywards for inspiration. What visions he must have imagined, what escape from his 'reality' he must have beckoned. What better alleviation than a mystic catalyst the 'silver sphere'. The 'silver sphere' transcends the simplicity of a carefree fluttering object into an ark of revolutionary thought. "Like a cloud of fire" this Unidentified Flying Object is a vehicle of dead souls traversing the barriers of time. The 'silver sphere' in its elevated position "from heaven, or near it' becomes "thou scorner of the ground". The commanding position it occupies is one of intellectual purity without the pain and strife of Shelley's experiences "thou lovest: but ne'er love's sad satiety".
The 'silver sphere' provokes Shelley's political consciousness if he could learn and accept unequivocably ..
"Teach me half the gladness
That thy brain must know,
Such harmonious madness
From my lips would flow
The world should listen then, as I am listening now."
...he could transpose its theoretical ramblings into reactionary change and replace the misery he saw around him into human happiness and harmony . Not an odd concept when you put this into a temporal dimension. If one draws a corollary with the 80's coke advertisement set to the tune of "We'd like to teach the world to sing and live in perfect harmony". A group of people, it seems, promoting a utopian dream based on the shallow premise of drinking coke and learning to sing. Maybe Shelley's skylark, with its beautiful voice and immortal presence, is offering us a 'short cut' to harmony. If we drink from the 'silver sphere', and sing its melody, immortality is only a 'sphere' ride away. Unlike the image of the coke advertisement in which millions of people have already succumbed to the promise, however, Shelley's UFO 'whose intense light narrows' is almost impossible to see in 'the white dawn clear'. One could draw a corollary here with the UFO phenomena itself. Seeing, for many, is believing. In the words of Anatole France "To accomplish great things, we must not only act, but also dream; not only plan, but also believe." Perhaps the singing of the skylark, in its simplest form, is the message of hope itself.......belief.
It is not a subject I know a lot about but there is abundant literature that documents the sightings of 'Silver Spheres' from virtually the onset of time and offers a fascinating insight into the sphere phenomena (see in particular 'The Hickman Report")