Nothing Gold Can Stay is a short poem of eight lines that contains subtle yet profound messages within metaphor, paradox and allegory. It is a compressed piece of work in which each word and sound plays its part in full.
Written when Frost was 48 years old, an experienced poet, whose life had known grief and family tragedy, the poem focuses on the inevitability of loss - how nature, time and mythology are all subject to cycles.
As with many a Frost poem, close observation of the natural world is the foundation for building poetic truths, inside of which lie hidden messages and ideas.
When the leaves start to show in the season of spring they are perceived as gold, but soon turn to familiar green and before too long they're fading as victims of time.
So it's possible to pick out three distinct associations:
the season of spring - holding on to precious color.
time - and the pace of life.
Eden - how humans experience grief and shame.
The term comrade in Animal Farm is important because it means a friend who is also an equal, as the other answer notes. However, its main importance is its contribution to the allegory of the story. Comrade is the official title used among people in Communist countries such as the Soviet Union. Animal Farm is a metaphor for the rise of the Soviet Union, and so the term comrade is used by the animals to refer to one another.
