“a huge peak, black and huge, As if with voluntary power instinct, Upreared its head.”
The mountain is shown in the poem like a great angry entity and represents the full might
and power of nature. It seems to take offense at the poet going too far or too ‘lustily’. You
could imagine it like a game of ‘chicken’ where the poet is rowing toward the mountain,
the closer he gets the more menacing it appears before he backs away.