Sonnet. Written Upon The Top Of Ben Nevis

Read me a lesson, Muse, and speak it loud
  Upon the top of Nevis, blind in mist!
I look into the chasms, and a shroud
  Vaporous doth hide them; just so much I wist
Mankind do know of hell: I look o’erhead,
  And there is sullen mist; even so much
Mankind can tell of heaven: mist is spread
  Before the earth, beneath me; even such,
Even so vague is man’s sight of himself.
  Here are the craggy stones beneath my feet;
Thus much I know that, a poor witless elf,
  I tread on them; that all my eye doth meet
Is mist and crag — not only on this height,
But in the world of thought and mental might.