Oh! dream of joy! is this indeed The light-house top I see? Is this the hill? is this the kirk? Is this mine own countree?
These questions seem to depict a mix of emotional release and also just disbelief. There was so much suffering, the mariner seems to not trust that home and the safety that comes with it are real, adding this feeling of fertility to this important moment.
Beneath the lightning and the Moon The dead men gave a groan.
Right in this moment it naturally blends, the natural world and the supernatural world. The moon and lightning set up the scene to feel kind of eerie. Then there is the dead man groaning that seems to have blended the boundary between death and life.
The self-same moment I could pray; And from my neck so free The Albatross fell off, and sank Like lead into the sea.
This moment is kind of a turning moment in the poem because there is almost this spiritual release being able to pray again; the albatross that falls away also symbolizes the lifting of guilt as well as the lifting of punishment.
'Twas sad as sad could be; And we did speak only to break The silence of the sea!
There is very exaggerated phrasing that almost shows the despair as something that has become pretty overwhelming. Speaking only to "break the silence" tells us that this isolation and loneliness is so intense that the conversation seems to have even lost meaning.
For all averred, I had killed the bird That made the breeze to blow. Ah wretch! said they, the bird to slay, That made the breeze to blow!
This is a reaction that really shows how the crew very quickly turns to blaming, once things go wrong. We see with "that made the breeze blow" its repitition puts focus on how the bird symbolizes balance, which means that its dealth feels like the reason for this suffering.
'God save thee, ancient Mariner! From the fiends, that plague thee thus!— Why look'st thou so?'—With my cross-bow I shot the ALBATROSS.
This sudden confession of killing the albatross was actually really abrupt. In the earlier part, the religious language seems to contrast with such violence, it made it feel very serious and like it was something that was not just an accident.
And now the STORM-BLAST came, and he Was tyrannous and strong: He struck with his o'ertaking wings, And chased us south along.
The storm is symbolism of something that is more opressive and violent, you could see it as a predator or a ruler. To add on, describing it as "tyrannous", also suggests that this crerw has completely lost control and is being driven purley by nature.
The Sun came up upon the left, Out of the sea came he! And he shone bright, and on the right Went down into the sea.
I belive this movement of the sun from left to right helps orient the journey and gives the voyage a sense of order and normalcy at the start. This contrasts with the chaos and suffering that will come later.
He holds him with his skinny hand, 'There was a ship,' quoth he.
The detail of the "skinny hand" being physical makes the mariner seem weak, but he still controls the wedding-guest. This contrast seems to me to be showing how his power comes from his story, not his strength.
The Bridegroom's doors are opened wide, And I am next of kin;
These lines put emphasis on not only social obligation but also celebration. This image of family duty and open doors depicted in this part differs significantly from Mariner's interruption, making this moment feeling even more disruptive.