John Keats passed away when he was 25 years old. So he had a difficult childhood. His parents died when he was young, He lost his younger brother due to tuberculosis. And he himself was suffering from the same disease. He met a lovely woman, and fell in love with her, he was going to die soon. In “Bright star, would I were steadfast as thou art“, Keats expresses both his love for her. And his painful, knowledge awareness that he cannot be with her forever.
At the beginning of the poem, Keats shows a strong desire to be like a bright star.
“Bright star, would I were steadfast as thou art”ll. A star stands for something eternal or unchanging. Although various things happen in our day- to- day, stars always reside in the sky each night. So the bright star symbolizes immortality Keats wants to have.
However, Keats clearly says that he does not want to be as lonely as the bright star. In this line,
Keats expresses the importance of companionship, and the fear of being alone.
Line 12, “Awake for ever in a sweet unrest”, means his love. Instead, he wants to be near and with his lover forever. but he could not stay with her. And in the next line, he says
“Still,still to hear her tender-taken breath”, means that he used depletion with the word ‘still’, which is used to make an impression or for emphasis. He loved everlasting star and he thought that he star was her. The line explains that he wanted to live forever with his lover, and, that moment, it was very important for him. In the line, the word “still” heard me he’s last shriek I believed. Keats, however Knows that it is impossible. And in line 14, “and so live ever-or else swoon to death” is felt that I think this line shows me John Keats understood and accepted the rise and fall we all have to go through in life. Furthermore, he willingly accepted the fact that we all have to die. In this stanza, Keats should his knowledge that he is not an immortal being and all living things cannot have eternal life. At the same time, however, he hope that his love would last forever. In the poem shows a contradiction where his star is an immortal being, but, at the same time, nothing lasts forever in this world. Keats loves his lover very much, but, since she is not an immortal being, he knew that she would change. Moreover, he really craved immortality, but, at the same time, he was very much aware that he could not be such thing.
In conclusion, people consider a star as a very noble being. Life, on the other hand, is not eternal and things must change. Immortal things look beautiful, but living things are not immortal. In this sense, Keats admires nature and compares it with his own situation, expressing such feelings in this poem.

Sources. http://navercast.naver.com/contents.nhn?contents_id=160 http://www.shmoop.com/bright-star/stanza-1-summary.html