Final answer:
There is no specific mention in John Dryden's "A Song for St. Cecilia's Day" of someone mistaking earth for heaven. The poem celebrates the power of music and its divine qualities.
Step-by-step explanation:
In the poem "A Song for St. Cecilia's Day" by John Dryden, there is no specific mention of someone who mistook earth for heaven. However, the thematic element of confusing earth with heaven can be seen as a broader literary device used in poetry to express the idea of transcendence or mistakenly attributing divine qualities to earthly beings or places. This poem specifically celebrates music's power and attributes almost heavenly qualities to it, possibly leading one to momentarily feel as if they are in a divine realm.