Prose

Apple= the fruit of knowledge, sin, fall of man, temptation, immortality.
Ladder to heaven = Jacob's ladder.
Winter = everything dies in winter. it is a symbol of death....
Night = is the absence of Light or Good, it seems evil and dark. Presence of ignorance.

...
The poem starts off with a few religious allusions- apple, heaven, ladder. The apple is a symbol which refers to sin, fall of man, temptation, immortality, knowledge, Heaven is itself referring to virtue, and ladder here can refer to Jacob's Ladder as stated in Bible. 


If apple is a temptation it will mean that after satisfying many desires the speaker seems to have become surfeit. He still has many things that he did not try but he has already had enough. Although his life has become sinful and it is at its end, he feels that the way to his salvation is still there. He can still go to heaven.


In this world full of temptation the speaker has been looking at the world the wrong way. Although he has been drunk with his desires, this world is nothing but old and perishable and dusty and ugly.


But his disillusion came at a very critical moment of his life- when his time in this world is almost up and he is on his way to the journey to the other world.


But he already knows what awaits for him as his life was full of sins. He knows his sins will be coming back to him now to get him; his sins will be paid in full; they will be clearly shown to him with every little detail; he will be suffering the consequences of the sin he has committed; there is no end to it. He knows these all as he himself has spent his whole life in doing them.


In his life he has satiated so many of his desires; he enjoyed and there were so much more to enjoy. But now he understands that all through his life the things he has been doing is of no worth.


But the speaker is now very much sad that his life will have to end in a long sleep and he may not ever wake up again.