Answer:
The speaker's love shall not fade as summer comes and goes. The conclusion is that his love is eternal forever. 'But thy eternal summer shall not fade'. This implies that just as summer comes and goes, the speajer's love doesn't. This makes this sonnet special and shows it's importance and the amazement of love within it. The sonnet compares with the speakers love to summer and the speakers love is greater than the sun that shines in the summer.
If this is a question off from commonlit, I got a 3/4 on this question
