1. Persona and Setting: The poem presents a speaker who is gazing up at a bright star (often interpreted as the planet Venus) and contemplates its "steadfastness"- its stability and unchanging nature.
2. Longing for Steadfastness: The speaker wishes he were as steadfast and unchanging as the star. He envies the star's constancy, as he recognizes the transitory nature of human life and experiences.
3. Human Transience: Keats reflects on the fleetingness of life and the human experience. He contrasts the stability of the star with the ever-changing and temporal nature of humanity.
4. Art as a Path to Immortality: Keats suggests that art, poetry, and the beauty of nature can offer a sense of permanence and transcendence over the transience of life.
5. Comparison to the Star: The speaker imagines merging with the star, finding solace, and peace in its steadfastness, and becoming a part of something larger and more enduring.
6. Star's Constancy: The star's unwavering presence inspires the speaker to persist through the challenges and uncertainties of human existence.
7. Temporal Love versus Ideal Love: Some interpretations suggest a contrast between a fleeting, human love and a transcendent, ideal form of love symbolized by the star.
8. Theme of Mortality: Keats reflects on the inevitability of death and the human desire for permanence and immortality.
9. Enduring Beauty: The poem celebrates the enduring beauty and permanence of nature and art as a source of comfort in faces of transience.
Overall, "Bright Star, would I were steadfast as thou art" explores themes of human mortality, the search for permanence, the transience of human experiences, and the solace found in art, poetry, and the enduring beauty of nature.