"I sing of an old land" is a short phrase that can have different interpretations depending on the context in which it is used. Without additional information or a specific reference, it is challenging to pinpoint a single main idea associated with this phrase.
However, if we approach it from a general perspective, "I sing of an old land" could imply a focus on the nostalgia, history, and cultural significance of a particular place. It suggests an intention to celebrate and honor the traditions, heritage, and natural beauty associated with an ancient land.
The main idea could revolve around expressing a deep connection and appreciation for the historical and cultural aspects of the land, emphasizing its timeless qualities and the enduring impact it has had on its inhabitants. It may convey a sense of longing, pride, or reverence for the old land and all that it represents.
It's important to note that this interpretation is subjective and can vary based on the context or artistic expression in which the phrase is used. Without more specific information, the main idea remains open to personal interpretation.