"Keep your eyes open" means that you can't sleep, but "keep your eyes open" has a deeper meaning, which has been ignored by scholars for thousands of years. In modern times, there was an expert who got the right answer. This expert was Mr. Chen Yinque. In Mr. Chen's "Yuan Bai's Poems and Notes", he said: "The so-called' always keep your eyes open' is like a fish, that is, you swear to die." Why is it that "keeping your eyes open" is like comparing yourself with a squid? Because "the eyes of the squid are long." The sentence "I will keep my eyes open all night, that lifelong trouble of your brow" can be understood as: I only have to open my eyes and miss you all night to repay the sacrifices you made for me and the hardships you experienced before your death. It means never to marry, in order to repay the kindness of his dead wife before her death.
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