Letting people know a benefit of eating less sodium
In this poem we can see the comparison of two points of view about one subject, in the first part of the poem, the speaker is in a lecture of an apparently very successful astronomer, where he sees charts, equations and numbers that represent many aspect of the stars, the speaker gets bored and doesn't seem to find any of this information interesting, so he goes out and sees the stars in the night sky and realizes that he doesn't need to understand all the numbers an science behind them to be able to appreciate their beauty.
So basically the romantic ideas are that even though the astronomer finds his/her passion in the science, to the writer, the science distracted him from the beauty of the stars themselves
The structure of the poem reinforce this idea, first by using contractions as learn'd, wander'd, the writer wants us to realize that the speaker doesn't have an educational level as high as the astronomer. Also, at the beginning of the poem, it is basically a description of the lecture told without much excitement otherwise, when the speaker goes out, the description became so much full of emotion, ex: In the mystical moist night-air..
I can't understand what are you asking about. Maybe it's in common. I think everyone should define their main priorities before using their last wish. And then choose the most important. But if you make wrong choice, you'll get bad consequences