In Edgar Allan Poe's poem "A Dream Within a Dream," the lines that best support the idea that "nothing in life is permanent" include:
- “All that we see or seem is but a dream within a dream.”
- “Yet if hope has flown away, in a night or in a day, is it therefore the less gone?”
These lines emphasize the fleeting nature of reality and the transient aspect of hope and existence, highlighting the poem's exploration of impermanence and the ephemeral quality of life. The notion that our experiences and perceptions may ultimately be illusory reinforces the idea that nothing lasts forever.